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
A stylish skate-shooter where pulling tricks reloads your guns mid-combat in a deadly blood sport.

Execution · Practiced Mastery
A 3D platformer about precise gravity-bending jumps through fixed galaxies.
Rollerdrome 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.
Rollerdrome
Trick-to-reload skating while aiming in slow motion is pure hands
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.
Rollerdrome
House Player enemies act on fixed behaviors
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.
Rollerdrome
Arenas and spawns are deterministic
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.
Rollerdrome
Combo routing and kill order define high scores
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.