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.

Execution · Practiced Mastery
Open-world reboot of Mirror's Edge centered on free-running across the city of Glass.
Metroid: Zero Mission leans Execution (Practiced Mastery); Mirror's Edge Catalyst leans Execution (Practiced Mastery).
Mirror's Edge Catalyst leans a little harder on execution, though the gap is small.
Metroid: Zero Mission
polished 2D movement plus a stealth finale
Mirror's Edge Catalyst
Flow-state parkour with timing-based combat
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
Mirror's Edge Catalyst
Enemies are scripted obstacles
Metroid: Zero Mission leans a little harder on variance, though the gap is small.
Metroid: Zero Mission
hidden passages unknown only once
Mirror's Edge Catalyst
Open world is static once explored
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
Mirror's Edge Catalyst
Time trials reward optimal route discovery
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.