head to head
Neither is simply harder - they are hard in different places. NCAA Basketball 10 demands more variance; Super Smash Bros. Melee demands more execution.

Execution · Competitive PvP
College basketball sim blending input timing with prediction against humans.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
NCAA Basketball 10 leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
NCAA Basketball 10
Shot timing, dribble moves and defense need stick skill
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
NCAA Basketball 10
Reading and countering a human opponent's offense matters
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
NCAA Basketball 10 leans clearly harder on variance.
NCAA Basketball 10
Shot outcomes and AI add measured randomness
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans a little harder on optimization, though the gap is small.
NCAA Basketball 10
Playbook and roster management form a solvable layer
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.