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
Precise jump execution across fixed levels with secrets to memorise.

Execution · Pure Mechanics
A Kinect rail-shooter testing gesture aiming against scripted enemies.
Super Mario World leans Execution (Pure Mechanics); The Gunstringer leans Execution (Pure Mechanics).
The Gunstringer leans a little harder on execution, though the gap is small.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
The Gunstringer
Kinect gesture aiming and dodging is the core skill
The Gunstringer leans a little harder on reads, though the gap is small.
Super Mario World
Scripted Koopas adapt to nothing
The Gunstringer
Enemies are scripted, not adaptive
The Gunstringer leans a little harder on variance, though the gap is small.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
The Gunstringer
Encounters are largely fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
The Gunstringer
Learning encounter sequences boosts scores
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.