head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Optimization · Pure Optimization
The Game Boy expedition that turns Metroid into a methodical extermination checklist deep inside SR388.

Optimization · Practiced Mastery
A gentle physics puzzle-platformer starring a creature made of unraveling yarn.
Metroid II: Return of Samus leans Optimization (Pure Optimization); Unravel leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid II: Return of Samus
Cramped Game Boy combat against Metroid forms.
Unravel
Gentle platforming and yarn-swing timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid II: Return of Samus
Creatures follow fixed behaviours.
Unravel
No opponent
Metroid II: Return of Samus leans a little harder on variance, though the gap is small.
Metroid II: Return of Samus
Disorienting unknown caverns until mapped.
Unravel
Everything is visible and fixed
Metroid II: Return of Samus leans a little harder on optimization, though the gap is small.
Metroid II: Return of Samus
Hunting all 39 Metroids is methodical route work.
Unravel
Physics puzzles with discoverable intended solutions
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.