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

Execution · Grand Arena
Team hero shooter blending FPS mechanics with ability economy mind games.

Execution · Competitive PvP
Arc System Works' Persona spinoff fighter where summoned Personas double every character's offense.
Overwatch leans Execution (Grand Arena); Persona 4 Arena Ultimax leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Overwatch
Hero aim, movement, and ability timing
Persona 4 Arena Ultimax
Persona combos, one-more cancels, and tight confirms need real hands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Overwatch
Ult tracking, flanks, and baiting human teams
Persona 4 Arena Ultimax
Awakening threats and persona-break baits stay human guessing.
Overwatch leans a little harder on variance, though the gap is small.
Overwatch
Minor spread and matchmaking noise
Persona 4 Arena Ultimax
Deterministic; status effects are earned, not random.
Overwatch leans a little harder on optimization, though the gap is small.
Overwatch
Team comps, ult economy, and positioning theory
Persona 4 Arena Ultimax
Persona card management and burst routing are labbable.
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.