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

Execution · Practiced Mastery
The 1981 arcade classic of climbing girders and dodging barrels.

Execution · Practiced Mastery
The 32-bit X series highlight where Zero becomes fully playable with his own saber-based campaign.
Donkey Kong leans Execution (Practiced Mastery); Mega Man X4 leans Execution (Practiced Mastery).
Donkey Kong leans a little harder on execution, though the gap is small.
Donkey Kong
Frame-tight jumps over barrels under arcade pressure
Mega Man X4
Dash-jump mobility and Zero's saber combos test hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong
Fixed arcade patterns, nothing adapts
Mega Man X4
Mavericks follow fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong
Barrel bounces add slight unpredictability
Mega Man X4
Upgrade capsule locations hidden initially
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong
Stage patterns and score routes fully learnable
Mega Man X4
Armor parts, weakness order, and X-vs-Zero routing
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.