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

Execution · Twitch Chaos
Item-luck kart racing with a creation suite bolted on.

Execution · Twitch Chaos
N64 couch classic where blue shells and shortcuts decide friendships.
LittleBigPlanet Karting leans Execution (Twitch Chaos); Mario Kart 64 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.
LittleBigPlanet Karting
Drifting and weapon timing decide most races
Mario Kart 64
Mini-turbo snaking and shortcut execution
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
LittleBigPlanet Karting
Human racers add light prediction in item battles
Mario Kart 64
Couch rivals bait shells and fakes
Mario Kart 64 leans a little harder on variance, though the gap is small.
LittleBigPlanet Karting
Random item pickups swing positions constantly
Mario Kart 64
Item draws swing every race
Mario Kart 64 leans a little harder on optimization, though the gap is small.
LittleBigPlanet Karting
Track lines and shortcut knowledge give a modest edge
Mario Kart 64
Shortcut and line knowledge is fully mapped
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.