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
A PSP prequel following three keyblade wielders with a deep command-melding build system.

Execution · Practiced Mastery
The notoriously demanding side-scrolling Zelda built on tight sword duels and RPG levelling.
Kingdom Hearts Birth by Sleep leans Optimization (Practiced Mastery); Zelda II: The Adventure of Link leans Execution (Practiced Mastery).
Zelda II: The Adventure of Link leans a little harder on execution, though the gap is small.
Kingdom Hearts Birth by Sleep
Dodge timing against brutal secret bosses
Zelda II: The Adventure of Link
Precise sword spacing, shield stabs, brutal platforming
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts Birth by Sleep
Pattern-based bosses, no adaptation
Zelda II: The Adventure of Link
Ironknuckles feint but follow fixed logic
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts Birth by Sleep
Command melding outcomes are documented
Zelda II: The Adventure of Link
Layouts fixed, little hidden randomness
Kingdom Hearts Birth by Sleep leans a little harder on optimization, though the gap is small.
Kingdom Hearts Birth by Sleep
Command deck melding largely solves the game
Zelda II: The Adventure of Link
XP routing, spell use, palace order planning
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.