Ah, you also asked this back in Feb on a dif thread so I'll copy paste my reply from there:
>"If you have all of the DVD Golden Collections, The Oscar Winners & Nominees collection, and the Superstars Collections, you will likely only be buying this for the 6 newly restored cartoons on discs 1 & 2."
Platinum v1 and v2 (upcoming) are missing, for example:
What's Up, Doc? Long Haired Hare My Bunny Lies Over The Sea Ballot Box Bunny Rabbit's Kin Big Top AND Big House Bunny Bully for Bugs Water Water Every Hare Wearing of the Grin Dough for the Do Do
Platinum v1 is missing some cartoons from Golden v1 that are on Platinum v2. But after a few minutes checking back and forth, neither Platinum has those I listed and some others. Hopefully Platinum v3 will have the missing shorts, but unless you care for blu quality, I think you can safely keep your Golds and not upgrade.