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
A crisp isometric action-adventure about a reaping crow.

Execution · Practiced Mastery
Third-person action where Captain Titus chainswords through ork hordes without a cover system.
Death's Door leans Execution (Practiced Mastery); Warhammer 40,000: Space Marine 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.
Death's Door
Tight dodge-and-strike combat
Warhammer 40,000: Space Marine
Melee-shooting flow and execution timing carry combat
Death's Door leans a little harder on reads, though the gap is small.
Death's Door
Scripted bosses with patterns
Warhammer 40,000: Space Marine
Ork hordes follow scripted aggression
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Death's Door
Deterministic world
Warhammer 40,000: Space Marine
Encounters are fixed and predictable
Death's Door leans a little harder on optimization, though the gap is small.
Death's Door
Stat allocation and weapon choice
Warhammer 40,000: Space Marine
Weapon choice and fury management are simple to learn
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.