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
Remake of the original Metroid with modern movement and a stealth epilogue.

Optimization · Practiced Mastery
Acrobatic puzzle-platformer where rewinding time turns every fatal mistake into a do-over.
Metroid: Zero Mission leans Execution (Practiced Mastery); Prince of Persia: The Sands of Time leans Optimization (Practiced Mastery).
Metroid: Zero Mission leans a little harder on execution, though the gap is small.
Metroid: Zero Mission
polished 2D movement plus a stealth finale
Prince of Persia: The Sands of Time
Acrobatic platforming chains need timing; rewind softens failure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid: Zero Mission
enemies and pirates are scripted
Prince of Persia: The Sands of Time
Sand creatures attack on fixed cues
Metroid: Zero Mission leans a little harder on variance, though the gap is small.
Metroid: Zero Mission
hidden passages unknown only once
Prince of Persia: The Sands of Time
Rewind power removes most consequence of surprise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid: Zero Mission
sequence breaks and route optimization are celebrated
Prince of Persia: The Sands of Time
Route reading and dagger resource management solve each room
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.