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

Execution · Pure Mechanics
A light-gun shooter testing aim while protecting a moving medic.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Rescue Mission 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.
Rescue Mission
Light-gun aiming accuracy is the entire game
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Rescue Mission leans a little harder on reads, though the gap is small.
Rescue Mission
Enemy soldiers spawn on scripts, not adaptively
Super Mario Odyssey
No adaptive opponents whatsoever.
Rescue Mission leans clearly harder on variance.
Rescue Mission
Enemy appearance timing adds some unpredictability
Super Mario Odyssey
Almost no randomness in level design.
Super Mario Odyssey leans clearly harder on optimization.
Rescue Mission
Prioritizing threats offers light tactics
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.