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

Execution · Practiced Mastery
Arthur's infamous SNES gauntlet of armor-shattering hazards that must be beaten twice with the right weapon.

Execution · Pure Mechanics
A 3D platformer whose joy lives in tight movement and capture-driven traversal.
Super Ghouls 'n Ghosts leans Execution (Practiced Mastery); 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.
Super Ghouls 'n Ghosts
Committed double jump and relentless hazards punish errors
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.
Super Ghouls 'n Ghosts
Scripted spawns, no adaptation
Super Mario Odyssey
No adaptive opponents whatsoever.
Super Ghouls 'n Ghosts leans a little harder on variance, though the gap is small.
Super Ghouls 'n Ghosts
Chest contents and zombie spawns add light randomness
Super Mario Odyssey
Almost no randomness in level design.
Super Ghouls 'n Ghosts leans a little harder on optimization, though the gap is small.
Super Ghouls 'n Ghosts
Weapon management and mandatory second loop demand routing
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.