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
Floaty one-button momentum control in arcade altitude duels.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Balloon Fight 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.
Balloon Fight
Flap-physics altitude duels demand precise momentum control
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Balloon Fight leans a little harder on reads, though the gap is small.
Balloon Fight
A couch rival adds light prediction; birds don't adapt
Super Mario World
Scripted Koopas adapt to nothing
Balloon Fight leans a little harder on variance, though the gap is small.
Balloon Fight
Enemy drift and lightning add arcade 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.
Balloon Fight
Spawn patterns and safe positions are quickly mapped
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.