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

Execution · Pure Mechanics
Futuristic sequel to the Trials physics-bike series with FMX tricks and brutally precise tracks.
F-Zero GX leans Execution (Pure Mechanics); Trials Fusion 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
Trials Fusion
Frame-tight balance and throttle inputs
F-Zero GX leans a little harder on reads, though the gap is small.
F-Zero GX
No adaptive opposition
Trials Fusion
No adaptive opposition
F-Zero GX leans a little harder on variance, though the gap is small.
F-Zero GX
Fixed tracks, deterministic physics
Trials Fusion
Deterministic physics, known tracks
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero GX
Machine settings and advanced technique routes are mappable
Trials Fusion
Optimal lines and trick scoring are learnable
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.