head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
Memorising spawn patterns then executing them flawlessly under one-hit-death rules.

Execution · Practiced Mastery
A 3D platformer about precise gravity-bending jumps through fixed galaxies.
Super Contra leans Execution (Practiced Mastery); Super Mario Galaxy 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Super Contra
One-hit deaths demand precise dodging and constant accurate fire
Super Mario Galaxy 2
Precise jumps and gravity navigation define every galaxy
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Contra
Alien waves follow fixed spawn scripts
Super Mario Galaxy 2
Bosses are scripted patterns, not adapting to you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Super Contra
Nothing random once spawn patterns are memorised
Super Mario Galaxy 2
Levels are deterministic, nothing random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Contra
Memorising spawns and weapon routes is half the run
Super Mario Galaxy 2
Learning fixed layouts and routes for stars
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.