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

Execution · Pure Mechanics
A snowboarding sim testing precise trick execution and line memorization.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Shredders leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Shredders leans a little harder on execution, though the gap is small.
Shredders
Precise trick timing, balance and landing control dominate
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Shredders leans a little harder on reads, though the gap is small.
Shredders
Mostly solo/coop, no adaptive opponent to predict
Super Mario World
Scripted Koopas adapt to nothing
Shredders leans a little harder on variance, though the gap is small.
Shredders
Slope conditions fixed, little randomness
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.
Shredders
Learning lines and trick combos for score 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.