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

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

Execution · Twitch Chaos
Item-luck kart racing with a creation suite bolted on.
FIFA: Road to World Cup 98 leans Execution (Competitive PvP); LittleBigPlanet Karting leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA: Road to World Cup 98
Arcade-paced dribbling and shot timing decide matches
LittleBigPlanet Karting
Drifting and weapon timing decide most races
FIFA: Road to World Cup 98 leans a little harder on reads, though the gap is small.
FIFA: Road to World Cup 98
Couch opponents can be baited; AI cannot
LittleBigPlanet Karting
Human racers add light prediction in item battles
LittleBigPlanet Karting leans a little harder on variance, though the gap is small.
FIFA: Road to World Cup 98
Bouncy ball physics inject classic FIFA luck
LittleBigPlanet Karting
Random item pickups swing positions constantly
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
LittleBigPlanet Karting
Track lines and shortcut knowledge give a modest edge
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.