Yes, that's exactly right where the 2 shots you've shown are concerned, corellian77. The matte of the City's 'underside' is identical , but Luke has shifted to the right in your bottom shot. And the clouds are strangely identical too of course, but that's for another day....
But just to clarify, the thing I was referring to at the end of my post, was that the 'vanes' in this shot do not tie-in with the other mattes, where Luke's position is in relation to them -
