>>11802334
SNES/SFC carts had SlowROM and FastROM chips, the latter being more expensive so publishers were prone to using SlowROM and maybe no battery back-up for cheaper releases.

Not familiar with whether or not Goemon or MMX uses SlowROM or FastROM or whatever, but it's a factor to consider when examining the performance of any SNES game.
MMX2 and X3 did use add-on chips for those fancy wireframe effects though.