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 · Pure Mechanics
A boss-rush action game that is nothing but execution tests against scripted duelists.

Execution · Pure Mechanics
A vertical bullet-hell shmup testing dodging precision against scripted patterns.
Furi leans Execution (Pure Mechanics); Raiden V 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.
Furi
Parry timing, bullet dodging, and duel precision
Raiden V
Dodging bullet patterns while shooting is the entire skill
Furi leans a little harder on reads, though the gap is small.
Furi
Bosses are scripted patterns, however adversarial they feel
Raiden V
Enemies follow fixed scripted patterns, not adapting
Raiden V leans a little harder on variance, though the gap is small.
Furi
Fixed boss sequences
Raiden V
Patterns are memorizable, little true randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Furi
Learning each boss's phases converges to mastery
Raiden V
Weapon selection and route learning is a meaningful layer
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.