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

Optimization · Pure Optimization
A prank-based puzzle game about sequencing traps against a scripted neighbor.

Optimization · Systems & Chaos
Puzzle adventure about coaxing a giant half-tame creature through ancient ruins.
Neighbours from Hell 2: On Vacation leans Optimization (Pure Optimization); The Last Guardian leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Neighbours from Hell 2: On Vacation
light timing on trap execution
The Last Guardian
Slow climbing and platforming, very forgiving
Neighbours from Hell 2: On Vacation leans a little harder on reads, though the gap is small.
Neighbours from Hell 2: On Vacation
neighbor follows scripted routine, not adaptive
The Last Guardian
Trico is willful but not modeling you adversarially
The Last Guardian leans a little harder on variance, though the gap is small.
Neighbours from Hell 2: On Vacation
some randomness in reaction timing
The Last Guardian
Trico's unpredictable compliance adds noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Neighbours from Hell 2: On Vacation
puzzle-solving trap sequences per room
The Last Guardian
Environmental puzzles with 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.