head to head
Super Stardust HD asks more than Super Mario World, and the gap is execution.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.

Execution · Pure Mechanics
PS3 twin-stick shooter wrapping planets in asteroid storms and chained multipliers.
Super Mario World leans Execution (Pure Mechanics); Super Stardust HD leans Execution (Pure Mechanics).
Super Stardust HD leans clearly harder on execution.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Super Stardust HD
Twin-stick precision amid screen-filling asteroid chaos
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Scripted Koopas adapt to nothing
Super Stardust HD
Spawns follow fixed logic, no adaptation
Super Stardust HD leans a little harder on variance, though the gap is small.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Super Stardust HD
Spawn positions vary modestly per run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
Super Stardust HD
Weapon matching and multiplier preservation reward strategy
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.