head to head
Mega Man 4 asks more than The Witcher 3: Wild Hunt, and the gap is execution.

Execution · Practiced Mastery
Classic platforming testing precise execution and the solvable boss-weakness order.

Optimization · Practiced Mastery
A narrative action RPG where build planning matters more than reflex execution.
Mega Man 4 leans Execution (Practiced Mastery); The Witcher 3: Wild Hunt leans Optimization (Practiced Mastery).
Mega Man 4 leans clearly harder on execution.
Mega Man 4
Precise jumps and buster timing through gauntlet stages
The Witcher 3: Wild Hunt
Combat timing matters but generous dodges forgive sloppy play.
The Witcher 3: Wild Hunt leans a little harder on reads, though the gap is small.
Mega Man 4
Robot Masters cycle fixed memorisable patterns
The Witcher 3: Wild Hunt
Enemies use fixed AI behaviours; no adaptation.
The Witcher 3: Wild Hunt leans a little harder on variance, though the gap is small.
Mega Man 4
Nothing random once stages are learned
The Witcher 3: Wild Hunt
Loot rolls and minor combat variance only.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mega Man 4
Weapon-weakness ordering and stage routing are the meta-puzzle
The Witcher 3: Wild Hunt
Builds, alchemy, and quest routing reward planning.
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.