head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, 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
Taopunk metroidvania whose parry-centric boss fights channel Sekiro in 2D.
Furi leans Execution (Pure Mechanics); Nine Sols 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
Nine Sols
Sekiro-style parry timing is the entire combat test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Furi
Bosses are scripted patterns, however adversarial they feel
Nine Sols
Bosses follow learnable scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Furi
Fixed boss sequences
Nine Sols
Deterministic authored world
Nine Sols leans a little harder on optimization, though the gap is small.
Furi
Learning each boss's phases converges to mastery
Nine Sols
Moveset study, talismans, and route knowledge
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.