Building comparison
head to head
DOOM (2016)vsosu!
Neither is simply harder - they are hard in different places. DOOM (2016) demands more optimization; osu! demands more execution.
DOOM (2016)
Execution · Pure Mechanics
Push-forward arena FPS where movement and aim are the whole game.
osu!
Execution · Pure Mechanics
Rhythm game where clicking circles to the beat becomes an athletic discipline.
DOOM (2016) leans Execution (Pure Mechanics); osu! leans Execution (Pure Mechanics).
DOOM (2016)osu!
Axis by axis
Execution8 vs 10
osu! leans clearly harder on execution.
DOOM (2016)
Aim, movement, glory-kill timing all peak.
osu!
Pixel-perfect cursor aim and tapping at extreme speeds
Reads1 vs 0
DOOM (2016) leans a little harder on reads, though the gap is small.
DOOM (2016)
Demons scripted attack patterns.
osu!
No opponent interaction in scoring
Variance1 vs 0
DOOM (2016) leans a little harder on variance, though the gap is small.
DOOM (2016)
Minimal encounter randomness.
osu!
Beatmaps are fully deterministic
Optimization5 vs 2
DOOM (2016) leans clearly harder on optimization.
DOOM (2016)
Rune and weapon mod picks meaningful.
osu!
Mod choices and map selection for ranking
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.