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
An arcade test of jump timing and enemy-flipping precision on a single screen.

Execution · Practiced Mastery
A modern beat-em-up where precise combo execution and enemy-pattern mastery are the skill ceiling.
Mario Bros. leans Execution (Pure Mechanics); Streets of Rage 4 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
Precise jumps and bump timing under crowding enemies decide survival
Streets of Rage 4
Precise combo strings, parry timing, and star-move usage are decisive
Streets of Rage 4 leans a little harder on reads, though the gap is small.
Mario Bros.
Versus mode adds light human interference, enemies are scripted
Streets of Rage 4
Enemies use scripted attack patterns; no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
Enemy spawns vary slightly but patterns are quickly learned
Streets of Rage 4
Enemy arrangement is largely fixed; minimal RNG
Streets of Rage 4 leans a little harder on optimization, though the gap is small.
Mario Bros.
POW block usage and enemy routing have known best lines
Streets of Rage 4
Character selection, route sequencing, and score management reward study
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.