I think it's arguable. Laser Time did a video with them playing both side by side. It's a fun watch: https://youtu.be/_GpBHA5_bd0
It was one of the rare games where the Genesis version bested the SNES one. I had a genesis and always felt the sting of having the lesser-than version of everything and could only jealously read about the better SNES versions in gaming magazines.
I played the hell out of my genesis Aladdin cartridge though. Fantastic gameplay.
People say this, sometimes to the point of asserting that the SNES version is just a bad game.
It's not. They're both really good games.
I think it's debatable. Most people I know say it's the other way around.