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 · Pure Mechanics
Rhythm game where clicking circles to the beat becomes an athletic discipline.

Execution · Pure Mechanics
A brutally precise platformer about dying thousands of times.
osu! leans Execution (Pure Mechanics); Super Meat Boy 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.
osu!
Pixel-perfect cursor aim and tapping at extreme speeds
Super Meat Boy
Pure twitch platforming, frame-perfect jumps
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
osu!
No opponent interaction in scoring
Super Meat Boy
No adaptive opponent
Super Meat Boy leans a little harder on variance, though the gap is small.
osu!
Beatmaps are fully deterministic
Super Meat Boy
Fully deterministic levels
Super Meat Boy leans a little harder on optimization, though the gap is small.
osu!
Mod choices and map selection for ranking
Super Meat Boy
Route memorization optimizes times
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.