So I now have every variant in hand (besides FYE, but it's on the way) and y'know, I really kind of hate the "collection". Unless you open them up, it's almost impossible to tell them apart. There's nothing different about the printed covers (fine print, bar codes, ect) and only the Enjoy The Toons variants have stickers (and pretty lame ones at that). The only decent one is the FYE, which has a special sticker clearly stating what variant it is. But I will include pics of the differences I can.
So, I've come up with a solution for myself, and am posting it for anyone else out there who might be as obsessive compulsive as myself. I've put together some images (labels), for each variant, that I plan to print out on sticker paper. I don't actually want to put the stickers on the sealed plastic, so I plan to buy some vinyl sleeves (like comics sleeves), stick it on that, and include a pic of the colored vinyl. This plan makes my collector brain really happy
1st Press
Enjoy The Toons Records
Optimus Prime Splatter(Small red dot sticker, upper left corner)1st Press
Enjoy The Toons Records
Megatron Splatter(No sticker)1st Press
ThinkGeek
Bumblebee Split(No sticker)2nd Press
Enjoy The Toons Records
Optimus Prime Split(Medium red dot sticker, upper right corner)2nd Press
Enjoy The Toons Records
Megatron Split(Big purple sticker, upper right corner)2nd Press
Enjoy The Toons Records
Starscream Split(Small yellow sticker, upper right corner)2nd Press
ThinkGeek
Soundwave Splatter(No sticker)2nd Press
FYE
Autobot/Decepticon Split(Special printed sticker, upper left corner)2nd Press
Light In The Attic Records
Autobot/Decepticon Splatter(No sticker, general release, so probably found elsewhere too)