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 · Pure Mechanics
One of the most mechanically demanding racers ever made, where mastering its physics tech is everything.

Execution · Pure Mechanics
A tilt-control balance game about rolling precisely through floating mazes.
F-Zero GX leans Execution (Pure Mechanics); Super Monkey Ball 3D leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero GX
Snaking and frame-tight control at absurd speeds
Super Monkey Ball 3D
Precise tilt control under gravity is the entire test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero GX
No adaptive opposition
Super Monkey Ball 3D
Solo stages, no opponent to predict
Super Monkey Ball 3D leans a little harder on variance, though the gap is small.
F-Zero GX
Fixed tracks, deterministic physics
Super Monkey Ball 3D
Levels are fixed with little randomness
F-Zero GX leans a little harder on optimization, though the gap is small.
F-Zero GX
Machine settings and advanced technique routes are mappable
Super Monkey Ball 3D
Optimal lines through mazes reward route learning
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.