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
A rough anime fighter testing input timing and second-guessing a human opponent.
Boxing leans Execution (Pure Mechanics); Dragon Ball GT: Final Bout 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
Dragon Ball GT: Final Bout
Combo inputs and meteor-counter timing decide exchanges
Dragon Ball GT: Final Bout leans a little harder on reads, though the gap is small.
Boxing
A human second player can be baited and predicted
Dragon Ball GT: Final Bout
Human opponents bait and adapt in versus play
Dragon Ball GT: Final Bout leans a little harder on variance, though the gap is small.
Boxing
Nothing hidden or random in the ring
Dragon Ball GT: Final Bout
Nothing hidden once movesets are known
Dragon Ball GT: Final Bout leans a little harder on optimization, though the gap is small.
Boxing
Scoring rules are shallow; positioning tricks are quickly learned
Dragon Ball GT: Final Bout
Small roster and shallow systems cap the study layer
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.