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.

Optimization · Practiced Mastery
The 1986 original that defined exploration-driven, secret-riddled platforming.

Optimization · Practiced Mastery
Trial-and-error memorisation of fixed death sequences, then executing the learned solution precisely.
Metroid leans Optimization (Practiced Mastery); Out of This World leans Optimization (Practiced Mastery).
Out of This World leans a little harder on execution, though the gap is small.
Metroid
stiff NES jumps and tough enemy contact
Out of This World
Precise jump and laser timing within tight scripted windows
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid
creatures follow fixed movement
Out of This World
Every threat is a fixed script, never adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid
unmarked secrets and bombable blocks hide the map
Out of This World
Deaths come from unknown scripted traps until memorised
Out of This World leans a little harder on optimization, though the gap is small.
Metroid
route and item knowledge transforms the game
Out of This World
The game is solved by mapping each screen's exact sequence
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.