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
Zelda-flavored musou about juggling battlefield objectives while mowing hordes.

Optimization · Practiced Mastery
Tests routing an ever-growing ball through fixed stages against the clock.
Hyrule Warriors leans Optimization (Practiced Mastery); Me & My Katamari 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.
Hyrule Warriors
Combo strings and weak-point gauge timing
Me & My Katamari
Awkward PSP rolling controls demand constant steering effort
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hyrule Warriors
Enemy hordes are mindless and scripted
Me & My Katamari
Objects and people never adapt to the ball
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hyrule Warriors
Minor drop and mission randomness
Me & My Katamari
Object layouts are fixed per stage
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hyrule Warriors
Keep management, character builds, and map priorities
Me & My Katamari
Size-growth routing per stage has learnable optimal paths
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.