"High-end" SNES games cost more. You could tell by weight. More weight=more chips=more RAM. (Nintendo controlled/produced every part, so there were never any "refinements"). Chrono Trigger was possibly the most expensive of that category, $80 IIRC. Megaman X2 and X3 might have cost more than standard as well, due to being among the few with their chip/feature (can't remember the name, but they are among the few that use the 2 small slots aside the main slot---go look at the cartridge, they're pretty unique among SNES games).