Some games may be on other systems or even games with same title but that dosnt mean its the same game, Jaguar could push great graphics in high res, something no other system of the day could match. The Jaguar was also developed for being a 2D game system first and foremost I think, it DID have a 64bit cpu but I wonder if that even matters, the amount of bits only mean scale of numbers you can process wich dosnt matter for most games anyway, its the frequency and other things that matters for a cpus capability, normal PC cpus was 32bits till quite recently, and because of high frequencys they blew away any 64bit console cpu pretty much I think. If you can operate on 2 or 4 instructions simultaneously with 64bit registers then thats ofcourse a bonus.
The Japanese devs were all behind Playstation and some Saturn, and Nintendo behind the N64, I think thats the reason things played out the way it did, that and the lack of a CD based core system for Jaguar. ATARI never had a competitor for SNES and MD so for a long period of time it became a shadowy name of the paste, atleast outside of USA I would think. Wasnt Jaguar even made as a competitor for precisly SNES and MD? I think I heard such a statement sometime, just compare the hardware capabilities then! Full 480 lines res with however many colors it could do, incredible effects capability and lightning fast cpu!

To bad it didnt come a couple years earlier, but it probably wouldnt have gotten Japanese devs behind it anyway.