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
Two Spider-Men, faster traversal, and deeper combo systems.
Batman: Arkham City leans Execution (Practiced Mastery); Marvel's Spider-Man 2 leans Execution (Practiced Mastery).
Marvel's Spider-Man 2 leans a little harder on execution, though the gap is small.
Batman: Arkham City
Combo chains and counters need timing.
Marvel's Spider-Man 2
Symbiote and dual-hero combat demands inputs.
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.
Marvel's Spider-Man 2
Enemies scripted, not modeling player.
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.
Marvel's Spider-Man 2
Light open-world randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: Arkham City
Gadget combos and challenge maps learnable.
Marvel's Spider-Man 2
Expanded skill trees and gadget combos 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.