head to head
FlatOut: Ultimate Carnage asks more than Super Mario World, and the gap is reads.

Execution · Pure Mechanics
Keeping speed through destruction-racing chaos that punishes clean-lap plans.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
FlatOut: Ultimate Carnage 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.
FlatOut: Ultimate Carnage
Holding racing lines through wrecks and ragdoll chaos tests hands
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
FlatOut: Ultimate Carnage leans clearly harder on reads.
FlatOut: Ultimate Carnage
Rival drivers ram predictably, light multiplayer jockeying
Super Mario World
Scripted Koopas adapt to nothing
FlatOut: Ultimate Carnage leans clearly harder on variance.
FlatOut: Ultimate Carnage
Debris and pileups scramble any planned lap
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.
FlatOut: Ultimate Carnage
Car upgrades and track shortcuts are mappable
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.