Dude, what do you want me to say? I put the two images in photoshop, overlaid one on the other and they match EXACTLY. It's the original footage but over manipulated.
I guess if you're the expert, but they really don't look anything
alike.
I'm no expert, I'm just saying that the shots line up perfectly when overlaid. The CGI model they have isn't an exact replica and would have to show some differences when overlaid. The biggest difference when I overlaid the images is from the extremely dark shadows. Makes it look very different indeed.
If it is CGI, then they painstakingly matched all of the lights and position of the ship.
That transition you posted isn't lined up properly, so it's not an accurate representation.