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 · Practiced Mastery
Darker Prime sequel built on mirrored light and dark world traversal.

Optimization · Pure Optimization
A polished co-op puzzle-platformer of physics contraptions and hero-ability combos.
Metroid Prime 2: Echoes leans Optimization (Practiced Mastery); Trine 4: The Nightmare Prince 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.
Metroid Prime 2: Echoes
lock-on combat, harsher but still forgiving aim
Trine 4: The Nightmare Prince
Platforming and physics manipulation need steady hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid Prime 2: Echoes
Ing follow scripted patterns
Trine 4: The Nightmare Prince
Scripted bosses and puzzles, nothing adapts
Metroid Prime 2: Echoes leans a little harder on variance, though the gap is small.
Metroid Prime 2: Echoes
dark-world hazards surprise until learned
Trine 4: The Nightmare Prince
Deterministic levels with no hidden information
Trine 4: The Nightmare Prince leans a little harder on optimization, though the gap is small.
Metroid Prime 2: Echoes
dual-world routing and key hunts reward planning
Trine 4: The Nightmare Prince
Combining three heroes' tools solves every puzzle
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.