Your one point about the Rolex movement is spot on, but the one about the Eta movement doesn't sit right. Both Eta and jlc movements are 3rd party, at least viewed that way by many. Given the choice of a mass produced, albeit tried and tested workhorse movement vs a movement by a company like Jlc, is not really comparing apples to apples. Think about the Rolex Daytona that used to house Zenith based movements as another example. Until they developed their own in house movement, it made sense for them to go with a Zenith over say a 7750.
To me, it's all about the wind, wind a 190 then wind a 232 and tell me which one feels like the better machined smoother running movement. Ap didn't use Jlc movements in some of their models because it was more affordable.
Oh, and what was the price difference between the two?
WAG MORE Bark Less!