head to head
Metal Slug 5 asks more than Super Mario World, and the gap is execution.

Execution · Pure Mechanics
A run-and-gun arcade shooter that is almost pure twitch execution.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Metal Slug 5 leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Metal Slug 5 leans clearly harder on execution.
Metal Slug 5
precise dodge/shoot run-and-gun demands
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.
Metal Slug 5
enemy waves are fully scripted patterns
Super Mario World
Scripted Koopas adapt to nothing
Metal Slug 5 leans a little harder on variance, though the gap is small.
Metal Slug 5
minor drop and spawn randomness
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Super Mario World leans a little harder on optimization, though the gap is small.
Metal Slug 5
weapon pickup and route memorization
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.