head to head
Neither is simply harder - they are hard in different places. Runbow demands more reads; Super Mario World demands more optimization.

Execution · Pure Mechanics
Reaction-speed platform racing where shifting colours keep redrawing the level under you.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Runbow 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.
Runbow
Fast platform racing through vanishing platforms is pure reaction
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Runbow leans clearly harder on reads.
Runbow
Light jostling with human racers, but little deep prediction
Super Mario World
Scripted Koopas adapt to nothing
Runbow leans clearly harder on variance.
Runbow
Colour swaps and party chaos randomise each race
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Super Mario World leans clearly harder on optimization.
Runbow
Minimal systems - momentum tricks and level memory only
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.