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

Execution · Pure Mechanics
A rhythm racer that turns any music file into a reflex puzzle track.

Execution · Pure Mechanics
An arcade fixed-shooter about blasting chicken waves and managing weapons.
Audiosurf leans Execution (Pure Mechanics); Chicken Invaders 5: Cluck of the Dark Side 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.
Audiosurf
Lane-switching to the beat tests reaction speed.
Chicken Invaders 5: Cluck of the Dark Side
Dodging and shooting waves needs steady reflexes
Chicken Invaders 5: Cluck of the Dark Side leans a little harder on reads, though the gap is small.
Audiosurf
No opponent.
Chicken Invaders 5: Cluck of the Dark Side
Chicken waves follow scripted formations
Chicken Invaders 5: Cluck of the Dark Side leans a little harder on variance, though the gap is small.
Audiosurf
Track generated from song, then fixed.
Chicken Invaders 5: Cluck of the Dark Side
Spawn patterns and drops vary slightly
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Audiosurf
Block-matching color strategy learnable per song.
Chicken Invaders 5: Cluck of the Dark Side
Weapon power-up management rewards planning
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.