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

Execution · Practiced Mastery
Loot-driven sequel sending Death through sprawling dungeons to clear War's name.

Execution · Practiced Mastery
A side-scrolling shooting test layered over loot-driven loadout optimisation.
Darksiders II leans Execution (Practiced Mastery); Shoot Many Robots 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 II
faster combo combat as Death
Shoot Many Robots
Run-and-gun aiming and dodging carry every level
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Darksiders II
no adaptive opponent
Shoot Many Robots
Robot hordes follow scripted behaviours, never adapting
Shoot Many Robots leans a little harder on variance, though the gap is small.
Darksiders II
loot drops add light randomness
Shoot Many Robots
Random loot drops shape each build's options
Darksiders II leans a little harder on optimization, though the gap is small.
Darksiders II
skill trees and dungeon puzzles reward planning
Shoot Many Robots
Gear and stat loadout tuning gates harder difficulties
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.