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
Two Spider-Men, faster traversal, and deeper combo systems.

Execution · Practiced Mastery
Crowd-control execution against memorised enemy waves in a classic belt-scroller.
Marvel's Spider-Man 2 leans Execution (Practiced Mastery); Streets of Rage 3 leans Execution (Practiced Mastery).
Streets of Rage 3 leans a little harder on execution, though the gap is small.
Marvel's Spider-Man 2
Symbiote and dual-hero combat demands inputs.
Streets of Rage 3
Perfect inputs trivialise crowd control, combos and weapon timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel's Spider-Man 2
Enemies scripted, not modeling player.
Streets of Rage 3
Co-op partner aside, enemies follow scripted aggression patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel's Spider-Man 2
Light open-world randomness.
Streets of Rage 3
Enemy waves are fixed once a route is learned
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel's Spider-Man 2
Expanded skill trees and gadget combos solvable.
Streets of Rage 3
Routing enemy spawns and special-meter management is the depth layer
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.