Honestly, the split is idiotic. It's like saying the Mario in Super Mario Brothers 1 to 4: Super Mario World is a different Mario to the one in Super Mario Galaxy, because that Mario has blue eyes and longer limbs compared to SMB Mario's shorter limbs and black eyes. "It explains why characters look so different" so does advancing in age. And the Sonic Adventure cutscene uses modern models because it saves on memory, nothing more. Unless you expect me to believe Tails had the Jet Anklets he found in that game when he first met Sonic? Regardless of my opinion on the world split, it's a shame we won't see Mighty and Ray in the comics. I like the duo and hope they can make their way in at some point.