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 · Practiced Mastery
A boxing game about memorizing scripted opponent tells and executing precise dodges.

Execution · Practiced Mastery
Crowd-control execution against memorised enemy waves in a classic belt-scroller.
Punch-Out!! leans Execution (Practiced Mastery); Streets of Rage 3 leans Execution (Practiced Mastery).
Punch-Out!! leans a little harder on execution, though the gap is small.
Punch-Out!!
precise dodge and punch timing
Streets of Rage 3
Perfect inputs trivialise crowd control, combos and weapon timing
Streets of Rage 3 leans a little harder on reads, though the gap is small.
Punch-Out!!
scripted opponent tells, not truly adaptive
Streets of Rage 3
Co-op partner aside, enemies follow scripted aggression patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Punch-Out!!
minimal randomness in fights
Streets of Rage 3
Enemy waves are fixed once a route is learned
Punch-Out!! leans a little harder on optimization, though the gap is small.
Punch-Out!!
memorizing fixed opponent attack patterns
Streets of Rage 3
Routing enemy spawns and special-meter management is the depth 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.