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

Execution · Pure Mechanics
A comedic reflex platformer testing jump timing against fast obstacles.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Montaro : RE 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.
Montaro : RE
Reflex jumping and timing carry this runner-platformer
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Montaro : RE
No adaptive opponent in a solo arcade game
Super Mario Odyssey
No adaptive opponents whatsoever.
Montaro : RE leans clearly harder on variance.
Montaro : RE
Some procedural obstacles add randomness
Super Mario Odyssey
Almost no randomness in level design.
Super Mario Odyssey leans clearly harder on optimization.
Montaro : RE
Little to solve beyond reacting to obstacles
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.