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

Execution · Practiced Mastery
The saga's flashy conclusion sending Sora through Pixar and Disney worlds toward the Keyblade War.
Hyrule Warriors leans Optimization (Practiced Mastery); Kingdom Hearts III leans Execution (Practiced Mastery).
Kingdom Hearts III leans a little harder on execution, though the gap is small.
Hyrule Warriors
Combo strings and weak-point gauge timing
Kingdom Hearts III
Limit Cut bosses require sharp reactions
Kingdom Hearts III leans a little harder on reads, though the gap is small.
Hyrule Warriors
Enemy hordes are mindless and scripted
Kingdom Hearts III
All opposition is scripted spectacle
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
Kingdom Hearts III
Minimal hidden systems
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
Kingdom Hearts III
Attraction commands or boss study both solvable
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.