head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Pure Mechanics
Reflex-timed throwing accuracy and ball economy along an accelerating rail.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Smash Hit 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.
Smash Hit
Timed taps to break glass before impact decide survival
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Smash Hit
No opponent - obstacles are preset courses
Super Mario World
Scripted Koopas adapt to nothing
Smash Hit leans a little harder on variance, though the gap is small.
Smash Hit
Minor obstacle shuffling, quickly familiar with replays
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.
Smash Hit
Ball conservation and multiball management extend runs
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.