head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
The original Souls game: scripted boss patterns you solve with builds, routes and disciplined execution.
Execution · Practiced Mastery
A survival shooter combining aim execution with resource optimization.
Demon's Souls leans Execution (Practiced Mastery); Resident Evil 4 Remake 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.
Demon's Souls
Stamina-timed dodges and parries punish sloppy hands.
Resident Evil 4 Remake
Precise aim and parry timing under pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Demon's Souls
Invasions exist but bosses are scripted patterns.
Resident Evil 4 Remake
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.
Demon's Souls
World tendency and upgrade drops add mild noise.
Resident Evil 4 Remake
Item drops and enemy spawns vary slightly
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Demon's Souls
Builds, routes and learned movesets are fully solvable.
Resident Evil 4 Remake
Inventory tetris, routing, and resource economy
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.