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
Arcade positioning and pop-order planning against deterministic bouncing balloons.

Execution · Practiced Mastery
Luchador metroidvania mixing brawler combos with demanding color-switch platforming.
Buster Bros. leans Execution (Practiced Mastery); Guacamelee! 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.
Buster Bros.
Dodging splitting balloons while firing demands precise positioning
Guacamelee!
Combo brawling and dimension-swap platforming challenges
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Buster Bros.
Balloons bounce on pure deterministic physics
Guacamelee!
Enemies telegraph fixed patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Buster Bros.
Weapon drops vary slightly per clear
Guacamelee!
Authored world with no randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Buster Bros.
Optimal pop order per fixed stage layout is learnable
Guacamelee!
Ability routing, combos, and secret hunting
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.