Creatively. Not counting choices like focus. Obviously you want to focus on the chosen subject. Or ISO, obviously lowest given other choices. Assume nearly infinite resolution of sensor. So not cropping or zooming, you can do that in Photoshop later. Color balance you can do later. You cannot change your lense you only have one.
None? Assuming a perfect camera that captures all the information in a scene everything can be changed after the fact?
The choice of lens can make a dramatic difference in the final effect of a photo, even if the subject is nominally 'the same size'.
@Eliza Yes, I understand. But this is a theoretical question. You already have the perfect lens attached.
@SteveBright I don't understand. The choice of lens is a creative choice in how you want the final result to look.