head to head
Neither is simply harder - they are hard in different places. Super Mario World demands more optimization; Track & Field II demands more execution.

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

Execution · Pure Mechanics
A button-mashing arcade sports game featuring track and field events.
Super Mario World leans Execution (Pure Mechanics); Track & Field II leans Execution (Pure Mechanics).
Track & Field II leans clearly harder on execution.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Track & Field II
Button-mashing speed and timing define every event.
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
Track & Field II
No opponent to out-predict, purely solo performance.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Track & Field II
Minimal randomness in event outcomes.
Super Mario World leans clearly harder on optimization.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
Track & Field II
Little strategy beyond raw execution speed.
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.