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

Optimization · Pure Optimization
Survival horror prequel built on swapping two characters with no item boxes.

Optimization · Pure Optimization
The foggy psychological horror landmark where dread, puzzles, and exploration outweigh combat skill.
Resident Evil 0 leans Optimization (Pure Optimization); Silent Hill leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil 0
Tank-control combat is modestly demanding
Silent Hill
Combat is deliberately clumsy and forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil 0
Enemies follow fixed behaviour
Silent Hill
Monsters follow fixed behaviors
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil 0
Hidden layouts surprise until mapped
Silent Hill
First-run fog hides layout and puzzle information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil 0
Two-character item juggling makes routing the real game
Silent Hill
Routes, puzzles, and endings fully converge on replay
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.