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
An arcade shmup testing dodge precision and memorised wave routing.
Super Mario World leans Execution (Pure Mechanics); TwinBee leans Execution (Pure Mechanics).
TwinBee leans a little harder on execution, though the gap is small.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
TwinBee
Dodging bullet patterns while juggling bells demands constant precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Scripted Koopas adapt to nothing
TwinBee
Enemy waves are fully scripted arcade patterns
TwinBee leans a little harder on variance, though the gap is small.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
TwinBee
Bell power-up juggling adds small randomness, quickly mapped
TwinBee leans a little harder on optimization, though the gap is small.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
TwinBee
Memorising wave layouts and bell routes drives high 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.