head to head
Neither is simply harder - they are hard in different places. Medal of Honor: Rising Sun demands more reads; Super Mario Odyssey demands more execution.

Execution · Pure Mechanics
Era-typical scripted WWII shooting galleries testing aim and placement memory.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Medal of Honor: Rising Sun leans Execution (Pure Mechanics); Super Mario Odyssey leans Execution (Pure Mechanics).
Super Mario Odyssey leans clearly harder on execution.
Medal of Honor: Rising Sun
Aim against scripted soldier placements is the core demand
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Medal of Honor: Rising Sun leans clearly harder on reads.
Medal of Honor: Rising Sun
Multiplayer adds light human prediction; campaign AI is static
Super Mario Odyssey
No adaptive opponents whatsoever.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Medal of Honor: Rising Sun
Setpiece missions replay identically
Super Mario Odyssey
Almost no randomness in level design.
Super Mario Odyssey leans clearly harder on optimization.
Medal of Honor: Rising Sun
Memorising enemy placements and routes is shallow but present
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.