head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
A surreal action game about rolling an ever-growing ball of everyday objects.

Optimization · Practiced Mastery
A co-op yarn puzzle-platformer where two tethered characters solve levels together.
Katamari Damacy leans Optimization (Practiced Mastery); Unravel Two leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Katamari Damacy
Dual-stick rolling control, forgiving but real
Unravel Two
Light platforming plus two-character swing coordination
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Katamari Damacy
No opposition, just clutter
Unravel Two
No adaptive opposition, co-op only
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Katamari Damacy
Object layouts are fixed
Unravel Two
Fixed levels, fully visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Katamari Damacy
Size-growth routing through each level
Unravel Two
Puzzles solved by routing two yarn characters together
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.