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
Darker Prime sequel built on mirrored light and dark world traversal.
Metroid leans Optimization (Practiced Mastery); Metroid Prime 2: Echoes leans Optimization (Practiced Mastery).
Metroid leans a little harder on execution, though the gap is small.
Metroid
stiff NES jumps and tough enemy contact
Metroid Prime 2: Echoes
lock-on combat, harsher but still forgiving aim
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
Metroid Prime 2: Echoes
Ing follow scripted patterns
Metroid leans a little harder on variance, though the gap is small.
Metroid
unmarked secrets and bombable blocks hide the map
Metroid Prime 2: Echoes
dark-world hazards surprise until learned
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid
route and item knowledge transforms the game
Metroid Prime 2: Echoes
dual-world routing and key hunts 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.