head to head
Halo 3 asks more than Super Mario Odyssey, and the gap is reads.

Execution · Pure Mechanics
Trilogy capstone whose equal-start arena multiplayer defined a console generation.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Halo 3 leans Execution (Pure Mechanics); Super Mario Odyssey 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.
Halo 3
Precision aim and grenade-melee timing
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Halo 3 leans clearly harder on reads.
Halo 3
Equal-start fights reward predicting humans
Super Mario Odyssey
No adaptive opponents whatsoever.
Halo 3 leans a little harder on variance, though the gap is small.
Halo 3
Equipment pickups and spawn variation
Super Mario Odyssey
Almost no randomness in level design.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Halo 3
Power-weapon timers and map control
Super Mario Odyssey
Moon routes and movement tech 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.