CalDigit TS4 vs OWC Thunderbolt Dock: Three Clean Splits
Card readers, 2.5 GbE and downstream Thunderbolt ports decide this outright. Which one each dock wins, and the laptop limit that neither can fix.
Both of these are one-cable docks that will run two monitors and charge your laptop. The spec sheets look close enough that most comparisons end in a shrug. They should not — there are three clean dividing lines, and each one decides the answer outright.
This is a research-based comparison drawn from the manufacturers’ published specifications. We have not tested either dock ourselves and do not claim to have. Our review standards. Full write-ups: CalDigit TS4 and OWC Thunderbolt Dock.
The short answer
Do you put camera cards into a computer? If yes, the TS4 — it has UHS-II SD and microSD readers built in and the OWC has none.
Do you have faster-than-gigabit internet or a NAS? If yes, the TS4 again — 2.5 GbE against the OWC’s 1 GbE.
Do you need to hang more Thunderbolt devices off the dock? Then the OWC, which is the one specification where it wins outright.
The ports, counted properly
| Port | CalDigit TS4 | OWC Thunderbolt Dock |
|---|---|---|
| Thunderbolt 4 total | 3 (1 host + 2 downstream) | 4 (1 host + 3 downstream) |
| USB-A | 5 at 10 Gb/s | 3 at 10 Gb/s + 1 at USB 2.0 |
| USB-C (non-Thunderbolt) | 3 at 10 Gb/s | None |
| DisplayPort | 1, full size | None |
| Ethernet | 2.5 GbE | 1 GbE |
| SD card reader | UHS-II, SD 4.0 | None |
| microSD reader | UHS-II, SD 4.0 | None |
| Audio | 2 out, 1 in | 1 combo jack |
| Laptop charging | 98 W | 90 W |
| Bus power | No | Yes |
Dividing line one: card readers
This is the cleanest split on the list, because it is binary. The TS4 has UHS-II SD and microSD readers. The OWC has neither.
UHS-II matters as much as the presence of a slot. A UHS-I reader tops out around 104 MB/s; UHS-II roughly triples that. If you shoot photographs or video and copy cards to a machine weekly, this is minutes off every offload, every week, for the life of the dock.
If you never touch a memory card, the readers are two holes you will never use and the rest of the comparison decides it.
Dividing line two: 2.5 GbE against 1 GbE
The TS4 has a 2.5 gigabit Ethernet port, the OWC has a standard gigabit one.
It helps in exactly two situations. You have a broadband plan faster than a gigabit — increasingly common but still a minority. Or you move large files to a network drive on your own LAN, where the 2.5 GbE port is talking to your NAS rather than the internet, and 2.5× is 2.5×.
Dividing line three: downstream Thunderbolt
Here the OWC wins, and it is the specification nobody leads with.
The TS4 has three Thunderbolt 4 ports, but one is the host connection to your laptop. That leaves two for devices. The OWC has four, leaving three.
One extra Thunderbolt port sounds small until you are the person with a Thunderbolt SSD, a Thunderbolt audio interface and a second display all wanting one. Thunderbolt devices can often be daisy-chained, but not all of them, and chains complicate troubleshooting.
The display question, which is not about the dock
The TS4 has a full-size DisplayPort; the OWC does not, so every display on it connects over USB-C or an adapter.
But how many monitors either dock drives is decided by your computer, not by the dock. A base-model Apple Silicon MacBook Air or 14-inch Pro supports one external display over Thunderbolt regardless of what the dock offers. Windows machines vary by graphics chip.
Bus power: the OWC’s quiet advantage
The OWC can run bus-powered, drawing from the laptop rather than needing its own adapter for some uses. The TS4 always needs its power brick.
That matters if the dock ever leaves the desk. A dock you can throw in a bag and use without hunting for the adapter is a meaningfully different object from one that cannot.
The flip side: 98 W against 90 W for charging. For a 13 or 14-inch laptop both are ample. For a 16-inch machine under load, neither will fully keep up, and the 8 W between them is not the deciding factor.
Which should you buy?
CalDigit TS4
- You offload camera cards
- You have multi-gigabit internet or a NAS
- You have a lot of USB-A and USB-C gear
- You want DisplayPort without an adapter
- The dock lives permanently on one desk
OWC Thunderbolt Dock
- You have three or more Thunderbolt devices
- The dock travels with you
- Gigabit is already faster than your internet
- You never use memory cards
- You want to spend less for the ports you actually use
And the option neither review pushes
If nothing in your current setup is actually broken — your laptop charges, your monitor works, your peripherals connect — a USB-C hub costs a fraction of either and may be all you need. We made that case in Anker 7-in-1 Hub vs CalDigit TS4. The honest test is whether a hub has already failed you.
What this comparison cannot tell you
We have not measured throughput, thermals, charging behaviour under load, or driver stability on any operating system. Every figure above comes from CalDigit’s and OWC’s published specifications. The guidance on display limits and Ethernet speeds reflects how Thunderbolt and networking work generally, not a test of these units.
Frequently asked questions
Which dock has more ports?
The TS4, by a clear margin — 18 in total, including five USB-A, three USB-C and two card readers. The OWC has fewer but gives you one more downstream Thunderbolt port.
Do I need 2.5 GbE?
Only if your broadband is faster than a gigabit, or you move large files to a NAS on your own network. Otherwise gigabit already exceeds what your internet delivers.
Will either run two 4K monitors?
That depends on your laptop, not the dock. Several base-model Apple Silicon machines support only one external display. Check your exact model before buying.
Is 90 W enough to charge my laptop?
For a 13 or 14-inch machine, comfortably. A 16-inch laptop under heavy load can draw more than either dock supplies, so it may charge slowly while you work.
Can I use the OWC dock without its power adapter?
It supports bus power, which the TS4 does not. That makes the OWC the more portable of the two.
Should I just buy a hub instead?
Quite possibly. If your laptop charges fine and your peripherals work, a hub is far cheaper. Docks solve power delivery and port-count problems you should already be feeling.
- CalDigit TS4 review
- OWC Thunderbolt Dock review
- Hub vs dock — the cheaper question first
- UGREEN Nexode 100W — if power is the real problem
Sources. Port counts, Thunderbolt versions, Ethernet speeds, card reader standards, charging wattage and bus-power support are CalDigit’s and OWC’s published specifications. We have not tested either dock ourselves. Primary source: CalDigit’s TS4 product page.
Buying a monitor too? The Dell U2724DE puts a Thunderbolt dock inside the screen.