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.

Execution · Practiced Mastery
Rapture's plasmid-and-pistol shooter where ideology meets gunplay.

Execution · Practiced Mastery
A musou-style hack-and-slash letting players mow down hordes as One Piece characters.
BioShock leans Execution (Practiced Mastery); One Piece: Pirate Warriors 4 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
BioShock
Shooting and plasmid timing required.
One Piece: Pirate Warriors 4
crowd-clearing combo execution against hordes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
BioShock
Splicers scripted; behaviors fixed.
One Piece: Pirate Warriors 4
enemies are scripted mobs, not adaptive
BioShock leans a little harder on variance, though the gap is small.
BioShock
Loot and splicer spawns randomized.
One Piece: Pirate Warriors 4
minimal randomness in stage encounters
BioShock leans a little harder on optimization, though the gap is small.
BioShock
Tonics, plasmids, weapon upgrades solvable.
One Piece: Pirate Warriors 4
character builds and combo routing are learnable
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.