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 · Competitive PvP
An analog-control boxing game where parry timing and feints decide versus bouts.

Execution · Competitive PvP
Weapon-based dueling testing spacing execution and mixup prediction against humans.
Fight Night Round 3 leans Execution (Competitive PvP); SoulCalibur III 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.
Fight Night Round 3
Analog punch swings and parry timing set the skill ceiling
SoulCalibur III
Spacing, movement and just-frame timing demand real hands
SoulCalibur III leans a little harder on reads, though the gap is small.
Fight Night Round 3
Versus boxing is feinting and baiting an adapting human
SoulCalibur III
Versus humans, conditioning and throw-mixup guessing decides rounds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fight Night Round 3
Minor cut and stun randomness
SoulCalibur III
Deterministic combat with nothing hidden
SoulCalibur III leans a little harder on optimization, though the gap is small.
Fight Night Round 3
Stamina management and fighter builds are studyable
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.