Am I misremembering or are there unique 4:3 and 16:9 versions of some Pixar movies?
I’m not sure what you mean by unique specifically, but I’ve noticed with many Pixar movies from 1998-2006 (with the exception of The Incredibles), the 4:3 versions only on DVD would be reframed to be closer to the left or right, show more of the top and bottom image, pan and scan here and there, etc. Took some screenshots of the Fullscreen version to the 2001 (reprint of 2000) DVD to Toy Story 2 to compare it to the normal widescreen version for comparison if you’d like to see.