head to head
Neither is simply harder - they are hard in different places. Mount Your Friends demands more reads; Super Mario Odyssey demands more optimization.

Execution · Pure Mechanics
Absurd physics limb control tested under a timer atop a tower of friends.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Mount Your Friends 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.
Mount Your Friends
QWOP-like limb control under a timer is the entire challenge
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Mount Your Friends leans clearly harder on reads.
Mount Your Friends
Rivals shape the tower but climbing is solo execution
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.
Mount Your Friends
The stack you face is visible, nothing hidden
Super Mario Odyssey
Almost no randomness in level design.
Super Mario Odyssey leans clearly harder on optimization.
Mount Your Friends
Grip-route planning up the pile helps marginally
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.