head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

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

Execution · Pure Mechanics
A boss-rush action game that is nothing but execution tests against scripted duelists.
F-Zero GX leans Execution (Pure Mechanics); Furi 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
Furi
Parry timing, bullet dodging, and duel precision
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
Furi
Bosses are scripted patterns, however adversarial they feel
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero GX
Fixed tracks, deterministic physics
Furi
Fixed boss sequences
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
Furi
Learning each boss's phases converges to mastery
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.