head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Tests creative tool-combination puzzle solving across a metroidvania sandbox.

Optimization · Pure Optimization
A physics puzzle-platformer about swapping three heroes to improvise solutions.
Supraland: Six Inches Under leans Optimization (Pure Optimization); Trine leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Supraland: Six Inches Under
First-person platforming and light combat need modest precision
Trine
Physics platforming and wizard-box stacking need dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Supraland: Six Inches Under
Solo world with no adaptive adversary
Trine
No opponent; puzzles are fixed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Supraland: Six Inches Under
Secrets are scripted-but-unknown until discovered
Trine
Levels are static and fully visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Supraland: Six Inches Under
Chaining ability tools into puzzle solutions is the core test
Trine
Choosing the right hero and contraption solves each obstacle
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.