head to head
Super Smash Bros. Melee asks more than Red Orchestra 2: Heroes of Stalingrad, and the gap is execution.

Execution · Competitive PvP
Hardcore Eastern Front shooter where exposure for seconds means death.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Red Orchestra 2: Heroes of Stalingrad leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Red Orchestra 2: Heroes of Stalingrad
Realistic ballistics and one-shot kills demand precise aim.
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
Red Orchestra 2: Heroes of Stalingrad
Anticipating human teams' pushes and covered angles.
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Red Orchestra 2: Heroes of Stalingrad leans a little harder on variance, though the gap is small.
Red Orchestra 2: Heroes of Stalingrad
Suppression, concealment, and unseen shooters.
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans clearly harder on optimization.
Red Orchestra 2: Heroes of Stalingrad
Map chokepoints and role mechanics reward study.
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.