Dell SD25TB4 vs Dell WD22TB4 - Thunderbolt 4 Dock Comparison 2026

Dell SD25TB4 vs Dell WD22TB4: Dell’s Newer Smart Dock Takes the Lead

The Dell SD25TB4 and Dell WD22TB4 are both Thunderbolt 4 docks built for Dell’s business ecosystem, but they target slightly different buyers. The WD22TB4 is the familiar office workhorse with modular design, dual-display support, and strong Dell laptop integration. The newer SD25TB4 pushes further with quad-display support, 2.5GbE, dual downstream Thunderbolt 4 ports, and remote fleet-management features aimed at IT teams.

The short verdict: The Dell SD25TB4 wins this comparison. It has the higher editorial score, more display headroom, faster Ethernet, and better downstream expansion than the Dell WD22TB4. The WD22TB4 still makes sense if you want a more established Dell dock and only need a traditional dual-monitor setup.

If you are still weighing Thunderbolt against standard USB-C docking, our USB-C vs Thunderbolt docking station guide explains the differences.

Quick Specs Comparison

Design and Docking Philosophy

These docks clearly come from the same Dell family, but the intent is different.

Dell SD25TB4

The SD25TB4 is Dell’s newer “smart dock” and it feels built for managed deployments first. The product file highlights remote management through Dell Device Management Console, a remote-management LED, MAC address pass-through on supported platforms, and Intel AMT over Thunderbolt on select systems. This is not just a desk dock. It is a dock Dell expects IT teams to deploy across fleets.

Dell WD22TB4

The WD22TB4 is the more familiar enterprise Dell dock. Its main design highlight is the modular Thunderbolt host module, which Dell positions as a future-proofing feature. It is compact, professional, and straightforward, with fewer headline features but a well-established place in the Dell laptop ecosystem.

Design winner: Tie. The WD22TB4 has the cleaner modular story, while the SD25TB4 adds smarter enterprise features. Which matters more depends on whether you are buying for one desk or for a managed fleet.

Port Comparison: The SD25TB4 Is More Ambitious

The biggest functional gap between these two docks is expansion.

USB and Thunderbolt Connectivity

The SD25TB4 gives you four USB-A 3.2 ports, two USB-C 3.2 ports, and two downstream Thunderbolt 4 ports. That matters if you want to attach fast storage, multiple accessories, and still keep room for future expansion.

The WD22TB4 offers four USB-A ports in total, two USB-C ports, and one downstream Thunderbolt 4 port. That is enough for a normal office setup, but it gives you less headroom than the SD25TB4.

Video Outputs

The SD25TB4 includes two DisplayPort 1.4 outputs, one HDMI 2.1 port, one USB-C video output, and two Thunderbolt outputs that can also play into more advanced display setups. The WD22TB4 gives you two DisplayPort 1.4 outputs and one HDMI 2.0 output.

Networking

This is a clean win for the SD25TB4. It upgrades Ethernet from Gigabit to 2.5 Gigabit, which is meaningful if you move large files across a local network or use faster office infrastructure.

Missing Features

Neither dock includes an audio jack or a card reader. If you need wired audio or SD storage access, you will need adapters either way.

Port winner: Dell SD25TB4. More downstream Thunderbolt, faster Ethernet, and a broader video mix make it the more capable dock.

Display Support: Quad Displays vs Dual Displays

This section is where the SD25TB4 creates the clearest separation.

The WD22TB4 is perfectly fine for the classic two-monitor office desk. The SD25TB4 is for buyers who need more flexibility, including triple- and quad-display setups on supported systems.

There are still platform caveats. The SD25TB4 product file specifically notes reduced functionality on Apple hosts and a maximum of two displays on Qualcomm-based PCs. The WD22TB4 also carries the usual Apple Silicon limit for base M-series Macs.

Display winner: Dell SD25TB4. Official four-display support is a substantial upgrade over the WD22TB4’s two-display ceiling.

Charging and Power Delivery

This comparison is closer than it first looks.

Both docks support up to 130W charging for compatible Dell laptops, which remains one of Dell’s strongest ecosystem advantages. For non-Dell laptops, the numbers split slightly: the SD25TB4 lists up to 96W, while the WD22TB4 lists up to 90W.

In other words, Dell laptop owners should see similar headline charging from both. Non-Dell owners get a small but real edge with the SD25TB4.

Power delivery winner: Dell SD25TB4, narrowly. Same Dell-specific top-end charging, slightly better standard PD for everyone else.

Compatibility and Platform Support

Both docks are Dell-first products, but their compatibility story is not identical.

The SD25TB4 product file lists official support for Windows, macOS, Linux, and ChromeOS. That is unusually broad for a business dock. At the same time, Dell documents major Apple-related caveats such as no MST extended desktop mode, no Wake-on-LAN, and no MAC address pass-through.

The WD22TB4 works with macOS and Linux too, but its file explicitly says macOS is not officially supported by Dell. It also notes that non-Dell laptops lose the 130W charging advantage.

For Windows and Dell fleet management, the SD25TB4 also has a stronger story thanks to Dell Device Management Console support.

Compatibility winner: Dell SD25TB4. It still has limitations, especially on Mac, but the broader official support and management tooling give it the edge.

Pricing and Value

The awkward part of this comparison is pricing: the WD22TB4 has a listed MSRP of $319.99, while the SD25TB4 product file does not list MSRP.

That means we cannot do a clean price-to-feature calculation. What we can say is this: if both are priced in the same general premium range, the SD25TB4 gives you more dock. Higher score, more displays, 2.5GbE, more Thunderbolt expansion, and better fleet-management capabilities all point in the same direction.

The WD22TB4 still has value if you want a simpler dual-monitor Dell dock with a known 3-year warranty and you do not care about 2.5GbE or multi-display scaling beyond two screens.

Value winner: Lean Dell SD25TB4. The missing MSRP prevents a strict value verdict, but feature-for-feature it is the stronger package.

Verdict: Dell SD25TB4 Wins

The Dell SD25TB4 is the better Dell Thunderbolt 4 dock overall. It scores higher, supports more displays, upgrades networking to 2.5GbE, and adds another downstream Thunderbolt 4 port. It is the dock with more room to grow.

The Dell WD22TB4 is not obsolete. It is still a capable choice for dual-monitor office desks, especially if you want a simpler and more established Dell dock. But on the facts available in the product files, the SD25TB4 is the more complete option.

Choose the Dell SD25TB4 if:

• You need support for up to three or four external displays
• You want 2.5 Gigabit Ethernet
• You want more downstream Thunderbolt expansion
• You manage Dell fleets and care about remote dock management
• You want the higher-scoring Dell dock

Choose the Dell WD22TB4 if:

• You only need a traditional dual-monitor setup
• You want Dell’s modular dock design
• A listed $319.99 MSRP and 3-year warranty matter to your buying decision
• You do not need 2.5GbE or extra Thunderbolt downstream capacity

For more detail on each model, read our Dell SD25TB4 review and Dell WD22TB4 review. If you are still comparing Dell against non-Dell alternatives, our CalDigit TS4 vs Dell WD22TB4 comparison is a useful next read.