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 punishing western arcade shooter testing directional-fire dexterity.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Gun.Smoke leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Gun.Smoke leans a little harder on execution, though the gap is small.
Gun.Smoke
Three-way shot aiming under relentless scroll pressure
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.
Gun.Smoke
Outlaws spawn in fixed patterns
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.
Gun.Smoke
Item barrels sit in the same spots every credit
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.
Gun.Smoke
Boss patterns and item routes reward memorisation
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.