head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Pure Mechanics
Faster, gorier sequel built around dismembering aggressive enemies before they swarm you.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Ninja Gaiden Sigma 2 leans Execution (Pure Mechanics); Super Mario Odyssey leans Execution (Pure Mechanics).
Ninja Gaiden Sigma 2 leans a little harder on execution, though the gap is small.
Ninja Gaiden Sigma 2
Delimb-and-finish combat under constant projectile pressure stays brutal
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.
Ninja Gaiden Sigma 2
Aggressive enemy AI remains pattern-driven
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.
Ninja Gaiden Sigma 2
Fixed missions; little randomness across runs
Super Mario Odyssey
Almost no randomness in level design.
Ninja Gaiden Sigma 2 leans a little harder on optimization, though the gap is small.
Ninja Gaiden Sigma 2
Weapon matchups and essence routing reward system study
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.