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.

Execution · Practiced Mastery
An open-city sequel deepening freeflow combat and predator gadget play.

Execution · Practiced Mastery
An action adventure rewarding combat timing against scripted boss patterns.
Batman: Arkham City leans Execution (Practiced Mastery); God of War Ragnarok leans Execution (Practiced Mastery).
God of War Ragnarok leans a little harder on execution, though the gap is small.
Batman: Arkham City
Combo chains and counters need timing.
God of War Ragnarok
Parry timing and combo execution in combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: Arkham City
Enemies scripted, not adaptive.
God of War Ragnarok
Bosses use fixed movesets
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: Arkham City
Fixed encounters and challenges.
God of War Ragnarok
Negligible randomness
God of War Ragnarok leans a little harder on optimization, though the gap is small.
Batman: Arkham City
Gadget combos and challenge maps learnable.
God of War Ragnarok
Build choices and moveset mastery solve bosses
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.