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
Acrobatic puzzle-platformer where rewinding time turns every fatal mistake into a do-over.

Optimization · Pure Optimization
Tests creative tool-combination puzzle solving across a metroidvania sandbox.
Prince of Persia: The Sands of Time leans Optimization (Practiced Mastery); Supraland: Six Inches Under leans Optimization (Pure Optimization).
Prince of Persia: The Sands of Time leans a little harder on execution, though the gap is small.
Prince of Persia: The Sands of Time
Acrobatic platforming chains need timing; rewind softens failure
Supraland: Six Inches Under
First-person platforming and light combat need modest precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Prince of Persia: The Sands of Time
Sand creatures attack on fixed cues
Supraland: Six Inches Under
Solo world with no adaptive adversary
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Prince of Persia: The Sands of Time
Rewind power removes most consequence of surprise
Supraland: Six Inches Under
Secrets are scripted-but-unknown until discovered
Supraland: Six Inches Under leans a little harder on optimization, though the gap is small.
Prince of Persia: The Sands of Time
Route reading and dagger resource management solve each room
Supraland: Six Inches Under
Chaining ability tools into puzzle solutions is the core test
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.