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

Execution · Competitive PvP
Weapon-based dueling testing spacing execution and mixup prediction against humans.
Overwatch leans Execution (Grand Arena); SoulCalibur III leans Execution (Competitive PvP).
Overwatch leans a little harder on execution, though the gap is small.
Overwatch
Hero aim, movement, and ability timing
SoulCalibur III
Spacing, movement and just-frame timing demand 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
SoulCalibur III
Versus humans, conditioning and throw-mixup guessing decides rounds
Overwatch leans a little harder on variance, though the gap is small.
Overwatch
Minor spread and matchmaking noise
SoulCalibur III
Deterministic combat with nothing hidden
Overwatch leans a little harder on optimization, though the gap is small.
Overwatch
Team comps, ult economy, and positioning theory
SoulCalibur III
Frame data, matchup study and stage knowledge run deep
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.