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

Execution · Pure Mechanics
A dexterity gag - fighting intentionally terrible physics controls to do simple tasks.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Hand Simulator leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Super Mario World leans a little harder on execution, though the gap is small.
Hand Simulator
Wrestling deliberately awkward finger physics IS the game
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Hand Simulator leans a little harder on reads, though the gap is small.
Hand Simulator
Multiplayer chaos is physics comedy, not prediction
Super Mario World
Scripted Koopas adapt to nothing
Hand Simulator leans clearly harder on variance.
Hand Simulator
Physics jank makes outcomes wobbly by design
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Super Mario World leans clearly harder on optimization.
Hand Simulator
Little system depth beyond learning the controls
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.