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 · Systems & Chaos
A gentle hidden-object hunt through painted insect scenes with light puzzles.

Optimization · Systems & Chaos
Puzzle adventure about coaxing a giant half-tame creature through ancient ruins.
Morphopolis leans Optimization (Systems & Chaos); The Last Guardian leans Optimization (Systems & Chaos).
The Last Guardian leans a little harder on execution, though the gap is small.
Morphopolis
Clicking painted scenes needs no dexterity
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.
Morphopolis
No opponent of any kind
The Last Guardian
Trico is willful but not modeling you adversarially
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Morphopolis
Hidden objects are scripted-but-unknown until spotted
The Last Guardian
Trico's unpredictable compliance adds noise
The Last Guardian leans a little harder on optimization, though the gap is small.
Morphopolis
Simple puzzle chains have single fixed answers
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.