Oops.

I realized my previous question wasn't concise. I meant to ask if there was a difference between the 2001 Platinum Edition of Snow White and the 2009 release.

I had assumed the 2009 Diamond edition was BD only, but evidently there is a DVD 2-disc Limited Edition non-Diamond release that came out at the same time.

Reviews of the '09 release are generally good, but I think I saw some people complaining the colors were over bright (that would be a shocker.) :-\

Edit: Answering my own question.

Platinum:

Diamond:

According to DVDizzy.com (formerly UltimateDisney.com):

The transfer features a more subdued color scheme that fits with reports of the filmmakers not wanting this to be too colorful as they weren't sure how long the human eye can sustain watching animation.