head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Competitive PvP
Fast arcade football execution with couch-multiplayer mind games.

Execution · Competitive PvP
Party sports where light timing and item luck outweigh deep strategy.
FIFA: Road to World Cup 98 leans Execution (Competitive PvP); Mario Sports Mix leans Execution (Competitive PvP).
FIFA: Road to World Cup 98 leans a little harder on execution, though the gap is small.
FIFA: Road to World Cup 98
Arcade-paced dribbling and shot timing decide matches
Mario Sports Mix
Timing shots and blocks matters but stays party-game forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA: Road to World Cup 98
Couch opponents can be baited; AI cannot
Mario Sports Mix
Human opponents fake passes and shots in versus play
Mario Sports Mix leans a little harder on variance, though the gap is small.
FIFA: Road to World Cup 98
Bouncy ball physics inject classic FIFA luck
Mario Sports Mix
Item drops and special shots inject deliberate chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA: Road to World Cup 98
Simple era tactics and exploit goals are quickly mapped
Mario Sports Mix
Shallow team and court knowledge caps quickly
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.