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
Compile's mecha vertical shmup for the Genesis, famed for speed and configurable option pods.

Execution · Practiced Mastery
Demanding platform execution plus a solvable boss-weakness ordering puzzle.
M.U.S.H.A. leans Execution (Practiced Mastery); Mega Man 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.
M.U.S.H.A.
Fast vertical dodging through dense fire tests the hands.
Mega Man
Pixel-precise jumps and shots against brutal fixed stages
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
M.U.S.H.A.
Enemies follow fixed choreography.
Mega Man
Robot Masters cycle rigid scripted patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
M.U.S.H.A.
Stages are fixed and memorisable.
Mega Man
Nothing changes between attempts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
M.U.S.H.A.
Option formations and weapon choice reward system mastery.
Mega Man
Boss-order weakness routing is a known solvable layer
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.