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

Execution · Pure Mechanics
The first online Mario Kart, infamous for the execution-heavy snaking technique dominating play.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Mario Kart DS leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Mario Kart DS leans a little harder on execution, though the gap is small.
Mario Kart DS
Snaking demands relentless precise drift inputs
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Mario Kart DS leans clearly harder on reads.
Mario Kart DS
Online opponents punish predictable lines
Super Mario World
Scripted Koopas adapt to nothing
Mario Kart DS leans clearly harder on variance.
Mario Kart DS
Item RNG decides tight finishes
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Mario Kart DS leans a little harder on optimization, though the gap is small.
Mario Kart DS
Kart stats, lines, and snaking routes
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.