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 · Competitive PvP
Tests combo execution and opponent prediction in an accessible anime arena fighter.

Execution · Competitive PvP
Classic licensed football testing input control and opponent pattern reading.
Demon Slayer: Kimetsu no Yaiba - The Hinokami Chronicles leans Execution (Competitive PvP); FIFA Soccer 2005 leans Execution (Competitive PvP).
FIFA Soccer 2005 leans a little harder on execution, though the gap is small.
Demon Slayer: Kimetsu no Yaiba - The Hinokami Chronicles
Combo timing and skill confirms decide exchanges
FIFA Soccer 2005
Off-the-ball control and finishing timing are mechanical skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Demon Slayer: Kimetsu no Yaiba - The Hinokami Chronicles
Versus mode means predicting a human opponent's habits
FIFA Soccer 2005
Human opponents adjust attack patterns across a match
FIFA Soccer 2005 leans a little harder on variance, though the gap is small.
Demon Slayer: Kimetsu no Yaiba - The Hinokami Chronicles
Nothing hidden once both characters are known
FIFA Soccer 2005
Bounces and keeper behaviour add minor chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Demon Slayer: Kimetsu no Yaiba - The Hinokami Chronicles
Character matchups and meter usage are studyable
FIFA Soccer 2005
Formations and exploit plays of the era are learnable
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.
full breakdown
Demon Slayer: Kimetsu no Yaiba - The Hinokami Chronicles →
full breakdown
FIFA Soccer 2005 →