head to head
Super Smash Bros. Melee asks more than Ready 2 Rumble Boxing, and the gap is reads.

Execution · Competitive PvP
Arcade punch timing with counter prediction in human bouts.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Ready 2 Rumble Boxing leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Ready 2 Rumble Boxing
Punch timing, dodges and rumble combos reward quick hands
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
Ready 2 Rumble Boxing
Human bouts become feint-and-counter prediction
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Super Smash Bros. Melee leans a little harder on variance, though the gap is small.
Ready 2 Rumble Boxing
Nothing hidden once boxers are learned
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans clearly harder on optimization.
Ready 2 Rumble Boxing
Boxer matchups and rumble meter use are quickly mapped
Super Smash Bros. Melee
Character matchup tiers and optimal movement routing are deeply studied
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.