Mario 64 was more impressive to me because it released so much earlier. By the time Zelda OoT released I had already had my mind completely fucking blown by Mario 64 so the impact wasn't as huge even though it was just as good of a game.
That first time I held an N64 controller and was able to run Mario around in actual circles in a fully 3D world is a moment I still haven't forgotten all these years later.







