The only good Game Gear Sonic games I've played on the GG are Sonic CHaos, Sonic Triple Trouble, Sonic Drift 2, Tails Adventure, and in some cases, Dr. Robotnik's Mean Bean Machine. The rest of them are crap. With Sonic 2 being the worst of them. I wonder if they put in any kind of 2 player for Sonic Drift, if not, I wouldnt be suprised....
But as for the game being 'worse' its probably 'as buggy' since they failed to fix any of the problems from the original, and even though its at 60 frames, it still bogs down. Previous Dreamcast builds had the game running at 60 frames a second, but even then the framerate wasnt rock solid.
If only Sonic Team had time back then, and when they gave a damn now.