head to head
Nightmare Kart asks more than Super Mario World, and the gap is reads.

Execution · Pure Mechanics
A gothic kart racer testing drift execution and track knowledge with item chaos.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Nightmare Kart leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Nightmare Kart
Drift lines and combat aim decide races
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Nightmare Kart leans clearly harder on reads.
Nightmare Kart
Human racers in versus add mild prediction
Super Mario World
Scripted Koopas adapt to nothing
Nightmare Kart leans clearly harder on variance.
Nightmare Kart
Item pickups inject kart-racer chaos
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Nightmare Kart
Track knowledge and boss patterns are learnable
Super Mario World
Secret exits and route knowledge add a modest solvable 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.