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 physics walking ordeal where controlling each individual footstep is the whole test.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Baby Steps leans Execution (Pure Mechanics); Super Mario World leans Execution (Pure Mechanics).
Baby Steps leans a little harder on execution, though the gap is small.
Baby Steps
Placing each physics-driven footstep is the entire challenge
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.
Baby Steps
Solo hike with no adversary at all
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.
Baby Steps
Terrain is fixed; only your stumbles are unpredictable
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.
Baby Steps
Route choice up the mountain matters but stays simple
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.