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

Optimization · Practiced Mastery
A first-person action RPG where ability builds and parry timing share the load.

Execution · Practiced Mastery
Big Daddy POV return to Rapture with tighter combat systems.
Avowed leans Optimization (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.
Avowed
First-person action, parry and dodge timing
BioShock 2
Dual-wield drill and gun timing matter.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Avowed
Scripted enemies
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.
Avowed
Loot rolls and enchant drops
BioShock 2
Sister-gathering waves add randomness.
Avowed leans a little harder on optimization, though the gap is small.
Avowed
Builds, companion synergy, ability planning
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.