head to head
Neither is simply harder - they are hard in different places. Infinity Runner demands more variance; Super Mario Odyssey demands more optimization.

Execution · Pure Mechanics
A first-person endless runner testing reflexes on a doomed spaceship.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Infinity Runner leans Execution (Pure Mechanics); Super Mario Odyssey leans Execution (Pure Mechanics).
Super Mario Odyssey leans a little harder on execution, though the gap is small.
Infinity Runner
Fast reflexes for dodging and QTEs define play
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Infinity Runner leans a little harder on reads, though the gap is small.
Infinity Runner
Scripted obstacles, no adaptive opponent
Super Mario Odyssey
No adaptive opponents whatsoever.
Infinity Runner leans clearly harder on variance.
Infinity Runner
Some procedural obstacle variation
Super Mario Odyssey
Almost no randomness in level design.
Super Mario Odyssey leans clearly harder on optimization.
Infinity Runner
Little to solve beyond reaction memorization
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.