Well, let's do some detective work.
(I can't see the traska photo for whatever reason, so excluding that)
4/5 are GMTs
3/5 are black dials
4/5 are mostly, or entirely, using indices and not numerals
3/5 have no rotating bezel
3/5 are about or under 1000$ USD
3/5 are on bracelets as pictured
So my vote would be the CW dune GMT with a black dial on a bracelet.
You're welcome. 😂
The column wheel was invented first (thanks Longines) and is more involved to produce/repair, so some people prefer it for its historical/traditional/craftsmanship value.
The cam and lever system was invented literally because the watchmakers wanted a cheaper way to actuate the chronograph and to service chronographs.
Most people will never know the difference, even if you've owned both. I think what actually makes a difference is the clutch mechanism — vertical vs horizontal. The issue being that most column wheel chronographs will have a vertical clutch, while its very common for a cam system to use a horizontal one, and the actuation is (typically) smoother with a vertical clutch.
Additional reading:
I have the blue dial and contrast is still not great. Because of the polished numerals and hands, they often look "black" without direct light. And "black" on navy is also pretty hard to see. Its doable, but not at a glance in a lot of lighting conditions.
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