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
The original reflex duel - paddle precision with a thin layer of placement prediction.
Boxing leans Execution (Pure Mechanics); Pong 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
Pong
Paddle positioning and return angles are pure motor skill
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
Pong
Against a human, anticipating placement adds a thin prediction layer
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Boxing
Nothing hidden or random in the ring
Pong
Fully deterministic ball physics
Boxing leans a little harder on optimization, though the gap is small.
Boxing
Scoring rules are shallow; positioning tricks are quickly learned
Pong
Angle strategy is shallow and quickly exhausted
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.