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
Zelda-meets-God-of-War action adventure starring the horseman War.

Execution · Practiced Mastery
Two Spider-Men, faster traversal, and deeper combo systems.
Darksiders leans Execution (Practiced Mastery); Marvel's Spider-Man 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.
Darksiders
combo-driven combat with dodge timing
Marvel's Spider-Man 2
Symbiote and dual-hero combat demands inputs.
Marvel's Spider-Man 2 leans a little harder on reads, though the gap is small.
Darksiders
enemies are scripted
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.
Darksiders
world and bosses are fixed
Marvel's Spider-Man 2
Light open-world randomness.
Darksiders leans a little harder on optimization, though the gap is small.
Darksiders
Zelda-style dungeons and upgrade routing
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.