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 · Pure Optimization
Reasoning through fixed adventure-logic puzzles inside a sci-fi story.

Optimization · Systems & Chaos
Puzzle adventure about coaxing a giant half-tame creature through ancient ruins.
The Fall 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.
The Fall
Light combat and platforming pose little physical test
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.
The Fall
Story AI characters are fully scripted
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.
The Fall
Puzzle solutions are hidden until reasoned out
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.
The Fall
Adventure-logic puzzles each have one intended answer
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.