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

Execution · Pure Mechanics
Cute two-button rhythm game where everything reduces to hitting notes on beat.

Execution · Pure Mechanics
A brutal minimalist platformer where flipping gravity replaces jumping.
Muse Dash leans Execution (Pure Mechanics); VVVVVV 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.
Muse Dash
Two-lane rhythm hits at high BPM are pure hands
VVVVVV
Pixel-perfect gravity flips through spike gauntlets
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Muse Dash
Charts never adapt
VVVVVV
No opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Muse Dash
Fully deterministic note charts
VVVVVV
Every hazard is fixed and visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Muse Dash
Character buffs and chart memorization help margins
VVVVVV
Routes are short and obvious; execution is everything
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.