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

Execution · Pure Mechanics
Input precision across five fixed skateboarding events with learnable optimal lines.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Skate or Die 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.
Skate or Die
Joystick precision on ramps, jumps and races decides every event
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Skate or Die leans a little harder on reads, though the gap is small.
Skate or Die
Pool joust against another human adds slight prediction
Super Mario World
Scripted Koopas adapt to nothing
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Skate or Die
Courses are fixed; nothing hidden after a few runs
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.
Skate or Die
Learning each event's optimal lines and trick values raises scores
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.