head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
A co-op action-adventure where two players must synchronise execution and planning to break out and stay free.

Execution · Practiced Mastery
Big Daddy POV return to Rapture with tighter combat systems.
A Way Out leans Execution (Practiced Mastery); BioShock 2 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.
A Way Out
Timed escapes and combat require responsive, accurate inputs
BioShock 2
Dual-wield drill and gun timing matter.
A Way Out leans a little harder on reads, though the gap is small.
A Way Out
Co-op partner coordination requires some social prediction
BioShock 2
Splicer AI scripted, not adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
A Way Out
Enemy patrols have scripted paths with some unpredictability
BioShock 2
Sister-gathering waves add randomness.
BioShock 2 leans a little harder on optimization, though the gap is small.
A Way Out
Escape routes and combat approaches have learnable optimal lines
BioShock 2
Plasmid combos and gear loadouts 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.