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

Execution · Pure Mechanics
Arcade run-and-stab timing against memorisable enemy spawn patterns.

Execution · Pure Mechanics
Arcade run-and-gun reflexes against fully memorisable boss patterns.
Rush'n Attack leans Execution (Pure Mechanics); Sunset Riders leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Rush'n Attack
Knife-range timing against dense spawns is the entire challenge
Sunset Riders
Dodging bullet spreads and snap-shooting bosses is everything
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Rush'n Attack
Soldiers spawn in fixed patterns
Sunset Riders
Bandits and bosses cycle memorisable arcade patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Rush'n Attack
Arcade waves are deterministic once learnt
Sunset Riders
Spawns are deterministic each credit
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Rush'n Attack
Memorising spawn patterns and weapon pickups solves runs
Sunset Riders
Pattern memorisation for one-credit clears is the meta-game
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.