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

Execution · Practiced Mastery
The fan-favourite sequel with harder levels and deeper secrets.

Execution · Practiced Mastery
The 32-bit X series highlight where Zero becomes fully playable with his own saber-based campaign.
Donkey Kong Country 2: Diddy's Kong Quest leans Execution (Practiced Mastery); Mega Man X4 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.
Donkey Kong Country 2: Diddy's Kong Quest
Demanding jump chains and animal-buddy control
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 Country 2: Diddy's Kong Quest
Fixed enemy patterns, no adaptation
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 Country 2: Diddy's Kong Quest
Secret Lost World entrances hidden until found
Mega Man X4
Upgrade capsule locations hidden initially
Mega Man X4 leans a little harder on optimization, though the gap is small.
Donkey Kong Country 2: Diddy's Kong Quest
Routes, DK coins, and bonuses fully mappable
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.