head to head
Neither is simply harder - they are hard in different places. Call of Juarez: The Cartel demands more reads; Super Mario Odyssey demands more execution.

Execution · Pure Mechanics
Routine shooter aim through scripted cartel firefights.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Call of Juarez: The Cartel leans Execution (Pure Mechanics); Super Mario Odyssey leans Execution (Pure Mechanics).
Super Mario Odyssey leans clearly harder on execution.
Call of Juarez: The Cartel
Standard FPS gunfights run on aim alone
Super Mario Odyssey
Precise platforming and capture-move tech ceiling.
Call of Juarez: The Cartel leans clearly harder on reads.
Call of Juarez: The Cartel
Co-op secret objectives add mild teammate suspicion
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.
Call of Juarez: The Cartel
Enemy waves spawn identically each run
Super Mario Odyssey
Almost no randomness in level design.
Super Mario Odyssey leans clearly harder on optimization.
Call of Juarez: The Cartel
Weapon levelling is a thin progression layer
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.