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
The stealth-brawler that defined rhythmic freeflow combat and predator rooms.

Execution · Practiced Mastery
Rapture's plasmid-and-pistol shooter where ideology meets gunplay.
Batman: Arkham Asylum leans Execution (Practiced Mastery); BioShock 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.
Batman: Arkham Asylum
Freeflow combo timing rewards rhythm.
BioShock
Shooting and plasmid timing required.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: Arkham Asylum
Thug AI scripted and mappable.
BioShock
Splicers scripted; behaviors fixed.
BioShock leans a little harder on variance, though the gap is small.
Batman: Arkham Asylum
Encounters deterministic.
BioShock
Loot and splicer spawns randomized.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: Arkham Asylum
Predator room routes and gadgets solvable.
BioShock
Tonics, plasmids, weapon upgrades 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.