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
A trap-heavy sequel where level knowledge beats reflexes.
Metroid: Zero Mission leans Execution (Practiced Mastery); Tomb Raider II 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
Tomb Raider II
Precise platforming plus more frequent gunplay
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
Tomb Raider II
Human enemies still run fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid: Zero Mission
hidden passages unknown only once
Tomb Raider II
Unknown traps and ambushes punish first runs
Tomb Raider II leans a little harder on optimization, though the gap is small.
Metroid: Zero Mission
sequence breaks and route optimization are celebrated
Tomb Raider II
Route, key-item, and secret solving dominate
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.