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
The N64 collectathon that buries five playable Kongs in collectibles.

Optimization · Pure Optimization
First-person puzzle platformer about flipping physics dimensions mid-jump.
Donkey Kong 64 leans Optimization (Practiced Mastery); Quantum Conundrum leans Optimization (Pure Optimization).
Donkey Kong 64 leans a little harder on execution, though the gap is small.
Donkey Kong 64
Moderate platforming and minigame dexterity
Quantum Conundrum
Mid-air dimension-swap platforming demands real timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong 64
Scripted bosses and enemies
Quantum Conundrum
No opponent present
Donkey Kong 64 leans a little harder on variance, though the gap is small.
Donkey Kong 64
Little randomness; secrets known once found
Quantum Conundrum
Fully deterministic puzzle rooms
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong 64
Routing five Kongs through collectible checklists
Quantum Conundrum
Dimension-switch sequences are the solvable core
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.