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 · Pure Mechanics
A two-minute test of joystick reflexes and simple punch-trading rhythm.

Execution · Competitive PvP
On-the-ball flair and one-on-one deception in small-sided street matches.
Boxing leans Execution (Pure Mechanics); FIFA Street leans Execution (Competitive PvP).
Boxing leans a little harder on execution, though the gap is small.
Boxing
Joystick speed and punch timing decide the two-minute bout
FIFA Street
Flair moves and trick timing decide 4-on-4 duels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Boxing
A human second player can be baited and predicted
FIFA Street
Beating a human marker is feint-versus-anticipation
FIFA Street leans a little harder on variance, though the gap is small.
Boxing
Nothing hidden or random in the ring
FIFA Street
Compact courts keep outcomes deterministic
FIFA Street leans a little harder on optimization, though the gap is small.
Boxing
Scoring rules are shallow; positioning tricks are quickly learned
FIFA Street
Reputation grind and team building are light systems
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.