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
Falling-block stacking under speed pressure with a twist of directional randomness.

Execution · Practiced Mastery
Careful climbing execution and route planning where a single mistimed grab undoes everything.
Pac-Attack leans Execution (Practiced Mastery); Peak 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.
Pac-Attack
Placing pieces under rising speed and gravity decides survival
Peak
Stamina-managed grip timing - one slipped input drops the whole climb
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pac-Attack
Solo stacking - no opponent modelling
Peak
Co-op against a mountain, no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pac-Attack
Pac-Man's random direction choice adds placement uncertainty
Peak
Daily map rotation and item spawns shuffle each ascent
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pac-Attack
Stack shapes that feed Pac-Man efficiently are learnable patterns
Peak
Routing the wall and rationing items decides summit attempts
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.