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
Pure jump timing over fully fixed, memorisable levels.

Execution · Practiced Mastery
Retro ninja platformer that flips from linear levels into a time-hopping metroidvania.
Super Mario Bros. leans Execution (Pure Mechanics); The Messenger leans Execution (Practiced Mastery).
Super Mario Bros. leans a little harder on execution, though the gap is small.
Super Mario Bros.
Perfect inputs trivialise momentum jumps over fixed hazards
The Messenger
cloudstep chains demand precise aerial control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario Bros.
Goombas walk left forever - nothing to predict
The Messenger
enemies and bosses are fully scripted
The Messenger leans a little harder on variance, though the gap is small.
Super Mario Bros.
Every level is identical on every run
The Messenger
deterministic level design
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario Bros.
Level memorisation and warp routing are fully solvable
The Messenger
upgrade economy and late-game route knowledge
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.