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
An open, maze-like Kirby where four Kirbys explore an interconnected mirror world.

Optimization · Systems & Chaos
Puzzle adventure about coaxing a giant half-tame creature through ancient ruins.
Kirby & The Amazing Mirror leans Optimization (Practiced Mastery); The Last Guardian leans Optimization (Systems & Chaos).
Kirby & The Amazing Mirror leans a little harder on execution, though the gap is small.
Kirby & The Amazing Mirror
Easy combat with floaty movement
The Last Guardian
Slow climbing and platforming, very forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby & The Amazing Mirror
No adaptive opposition
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.
Kirby & The Amazing Mirror
Maze layout unknown until explored
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.
Kirby & The Amazing Mirror
Navigating the interconnected mirror-world maze for mirror shards
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.