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 lovingly curated Beatles career retrospective playable as a full band with vocal harmonies.
Super Mario World leans Execution (Pure Mechanics); The Beatles: Rock Band leans Execution (Pure Mechanics).
Super Mario World leans a little harder on execution, though the gap is small.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
The Beatles: Rock Band
Gentler charts plus three-part vocal harmonies
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
The Beatles: Rock Band
Nothing adapts
Super Mario World leans a little harder on variance, though the gap is small.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
The Beatles: Rock Band
Fixed charts
Super Mario World leans a little harder on optimization, though the gap is small.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
The Beatles: Rock Band
Harmony arrangement and overdrive timing
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.