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
A vibrant 2D platformer with rhythm-based highlight levels.

Execution · Pure Mechanics
Split-attention aiming and flying through fixed, memorizable rail-shooter stages.
Rayman Legends leans Execution (Pure Mechanics); Star Fox Zero 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.
Rayman Legends
Tight 2D platforming and music levels
Star Fox Zero
Dual-screen aiming while flying is the central demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Rayman Legends
No adaptive opponent
Star Fox Zero
Enemy squadrons fly scripted routes
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Rayman Legends
Fixed levels
Star Fox Zero
Levels replay identically every run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Rayman Legends
Time trial routing
Star Fox Zero
Score routes and medal paths reward memorization
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.