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

Execution · Practiced Mastery
Arcade-style western shooter built around stage gunfights and showdown duels.

Execution · Pure Mechanics
A rail light-gun shooter testing aim and reaction against scripted horrors.
Red Dead Revolver leans Execution (Practiced Mastery); Silent Hill: The Arcade leans Execution (Pure Mechanics).
Silent Hill: The Arcade leans a little harder on execution, though the gap is small.
Red Dead Revolver
Arcade gunplay and duel timing dominate
Silent Hill: The Arcade
Light-gun aiming and reaction speed are core
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Revolver
Enemies are scripted shooting-gallery foes
Silent Hill: The Arcade
Enemies appear on fixed rails, not adaptive
Silent Hill: The Arcade leans a little harder on variance, though the gap is small.
Red Dead Revolver
Minor spawn variation
Silent Hill: The Arcade
Some enemy spawn variation adds chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Revolver
Level layouts and duel rhythms are learnable
Silent Hill: The Arcade
Learning enemy spawn spots rewards memorization
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.