CalDigit TS4 vs Dell SD25TB4 - Thunderbolt 4 Dock Comparison 2026

CalDigit TS4 vs Dell SD25TB4: two premium docks with different priorities

The CalDigit TS4 and Dell SD25TB4 are both premium Thunderbolt 4 docks, but they are built for different people. The TS4 is a broad, power-user dock with 18 total ports, UHS-II card readers, three audio connections, 2.5GbE networking, and a 9.2 review score. The SD25TB4 is Dell’s newer smart dock for business desks, with official support for up to four external displays, dual Thunderbolt 4 downstream ports, 2.5GbE, and Dell Device Management Console support.

The short version: the CalDigit TS4 is the better all-around dock. It wins on score, port count, creator-friendly extras, and Mac confidence. The Dell SD25TB4 is the better choice if you are buying for a Dell-managed office or you specifically need its display and remote-management features.

If you are still deciding whether you need Thunderbolt at all, start with our USB-C vs Thunderbolt docking station guide. If you already know you want a high-end Thunderbolt setup, this matchup comes down to one question: do you want the most complete desk dock, or the smarter Dell fleet dock?

Quick specs comparison

Ports: CalDigit gives you more of the everyday stuff

The CalDigit TS4 has 18 total ports. The useful part is not just the number, it is the mix. You get three Thunderbolt 4 downstream ports, three USB-C 3.2 ports, five USB-A 3.2 ports, DisplayPort 1.4, 2.5GbE, SD and microSD UHS-II readers, and three separate audio connections.

That makes the TS4 easier to live with if your desk has a lot attached to it: keyboard, mouse, webcam, USB microphone, external SSD, phone, card reader needs, Ethernet, and one or two monitors. You are less likely to need a second hub hanging off the first one.

The Dell SD25TB4 is not sparse. Its YAML lists four USB-A 3.2 ports, two USB-C 3.2 ports, two DisplayPort 1.4 outputs, HDMI 2.1, USB-C DisplayPort Alt Mode, two Thunderbolt 4 ports, and 2.5GbE. That is a strong office layout, especially for monitors. But it skips two things the TS4 includes by default: card readers and audio jacks. Dell even lists “No built-in audio jack or card reader” as a con.

For photographers, video editors, podcast desks, and anyone who still uses wired headphones or a mic input, the TS4 is simply more complete out of the box. For a corporate desk where the monitor cables matter more than front-facing media ports, the Dell layout makes sense.

Port winner: CalDigit TS4. The Dell has more direct display connectors, but the TS4 has more total ports and a better spread for mixed desk setups.

Display support: Dell has the bigger number, with caveats

This is where the Dell SD25TB4 pushes back hard. The CalDigit TS4 lists support for up to two displays, including dual 4K@60Hz and single 8K@30Hz on Windows. That is enough for most people buying a Thunderbolt 4 dock, and it is the clean, expected Thunderbolt experience.

The Dell SD25TB4 goes further on paper. Its YAML lists up to four external displays, with triple and quad display setups up to 4K@60Hz depending on the host, cables, and DSC support. It also lists single 8K@60Hz through DisplayPort 1.4 with DSC when the display is connected using two DisplayPort cables on supported Thunderbolt hosts.

That sounds like an easy Dell win, but the host matters. The Dell file also calls out macOS limitations with Apple USB-C hosts, including no MST extended desktop support. Its common issues section says dual displays on macOS can mirror instead of extending when both monitors are connected through DP or HDMI-style outputs, and the workaround is to use one display through Thunderbolt.

So the display verdict depends on your computer. On a supported Dell or Windows Thunderbolt system, the SD25TB4 is the stronger multi-monitor dock. On Mac, the TS4 is the safer pick because its display story is simpler and CalDigit’s own product positioning is more Mac-friendly.

Display winner: Dell SD25TB4 for supported Windows and Dell systems. CalDigit TS4 for the cleaner Mac experience.

Charging: Dell wins for Dell laptops, CalDigit wins for standard USB-C PD

The CalDigit TS4 delivers up to 98W USB-C Power Delivery. That is enough for most MacBook Pro and Windows ultrabook workflows, and the behavior is straightforward: compatible laptops get the same standard charging profile.

The Dell SD25TB4 is more conditional. Its YAML lists 96W host Power Delivery in the structured power field, and its editorial text and pros list 130W charging for compatible Dell laptops. That split is important. Dell users can get the special high-wattage benefit. Non-Dell users should think of it as a 96W dock.

For a Dell Latitude, Precision, or other supported business laptop, that 130W capability can matter. For a MacBook or non-Dell Windows laptop, the CalDigit’s 98W is slightly higher than the Dell’s listed non-Dell charging.

Charging winner: Dell SD25TB4 for compatible Dell laptops. CalDigit TS4 for non-Dell systems.

Mac and Windows compatibility

Both docks require no driver for basic docking functions. Both use Thunderbolt 4 at 40 Gbps. That does not mean the support experience is the same.

The TS4 is the more comfortable Mac recommendation. Its YAML lists macOS, Windows, ChromeOS, and Linux support, with no drivers required. It also calls out CalDigit firmware updates and notes that base M1/M2/M3 Macs are limited to one external display because of Apple’s host limitation, not because of the dock.

The Dell SD25TB4 has broader official operating-system notes than many business docks: Windows 10 and 11, macOS, Ubuntu 24.04, Red Hat Enterprise Linux 9.6+, and ChromeOS 137. That is good. But the same YAML also documents reduced features on Apple USB-C hosts: no MST extended desktop mode, no MAC address pass-through, no Wake-on-LAN, no firmware update utility through macOS, and up to 96W charging.

For Windows users in a Dell environment, those tradeoffs may not matter. Dell Device Management Console, firmware management, PXE boot, Intel AMT over Thunderbolt on select vPro systems, and MAC address pass-through are exactly the kinds of features IT departments care about. The TS4 is more of a desk tool. The SD25TB4 is also an endpoint-management object.

Compatibility winner: CalDigit TS4 for Mac and mixed setups. Dell SD25TB4 for Dell-managed Windows fleets.

Enterprise features: Dell has a lane the TS4 does not chase

The TS4’s strength is hardware completeness. It is the dock you buy when you want one cable to handle almost everything on a personal or professional desk.

The SD25TB4’s strength is fleet management. Dell’s YAML mentions Dell Device Management Console, remote monitoring, firmware management, peripheral inventory, settings management, a remote-management LED, PXE boot, Intel AMT over Thunderbolt on select vPro systems, and MAC address pass-through on supported platforms.

Those features do not make the dock better for a home MacBook setup. They do make it more useful when a company needs to manage dozens or hundreds of desks. If an IT team already standardizes on Dell laptops, the SD25TB4 has a practical advantage that the TS4 does not try to match.

Enterprise winner: Dell SD25TB4. This is the clearest reason to pick it over the TS4.

Value: the TS4 justifies its premium better for most buyers

The CalDigit TS4 lists a $379.99 MSRP. The Dell SD25TB4 YAML does not list an MSRP, so a clean dollar-for-dollar comparison is not available from the product data. The better comparison is feature value.

The TS4 gives you the higher score, more total ports, more USB flexibility, card readers, audio, 2.5GbE, and stronger Mac confidence. If you are buying one dock for one desk, those are features you can use immediately.

The Dell gives you official quad-display capability, direct HDMI 2.1, more Dell-specific charging upside, and remote-management features. Those are valuable, but only if your host and environment can use them. A Mac user who cannot use Dell’s MST path cleanly is paying attention to the wrong advantage. A Dell IT buyer who needs management telemetry will see the value differently.

Value winner: CalDigit TS4 for individual buyers. Dell SD25TB4 for Dell fleet buyers.

Verdict: CalDigit TS4 wins overall, Dell SD25TB4 wins a specific office niche

The CalDigit TS4 wins this comparison because it is the stronger general-purpose Thunderbolt 4 dock. The score gap is clear: 9.2 for the TS4 versus 8 for the Dell SD25TB4. The TS4 also has more total ports, better creator extras, standard 98W charging, and fewer Mac caveats.

The Dell SD25TB4 is still a good dock. In the right environment, it is the better tool. If you have compatible Dell laptops, need up to 130W Dell charging, want official quad-display support, and care about Dell Device Management Console, the SD25TB4 makes a lot of sense. It is not trying to be the most universal dock. It is trying to be the smart dock for modern Dell desks.

Choose the CalDigit TS4 if:

• You want the better all-around dock for Mac and Windows
• You need SD and microSD card readers
• You use wired audio, a USB microphone setup, or lots of peripherals
• You want 98W standard USB-C charging
• You care more about personal desk flexibility than fleet management
• You want the higher-rated product in our database

Choose the Dell SD25TB4 if:

• You use a compatible Dell laptop and want 130W charging
• You need official support for up to four external displays on supported hosts
• Your company manages docks through Dell Device Management Console
• You want direct HDMI 2.1 plus dual DisplayPort 1.4 outputs
• You are buying for a Dell-heavy Windows fleet
• You do not need built-in audio or card readers

For most readers, I would buy the CalDigit TS4. For a Dell IT rollout, I would spec the Dell SD25TB4 without pretending it is the same kind of product.

If neither sounds quite right, compare the TS4 against another premium option in our CalDigit TS4 vs OWC Thunderbolt 4 Dock guide, or browse the full docking station rankings.