head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Execution · Pure Mechanics
Punishing beat-em-up execution with zero margin and memorised stages.

Execution · Practiced Mastery
Crowd-control execution against memorised enemy patterns, stage by stage.
Double Dragon III: The Sacred Stones leans Execution (Pure Mechanics); Streets of Rage 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.
Double Dragon III: The Sacred Stones
Brutal difficulty and no continues punish every missed input
Streets of Rage
Spacing, crowd control and throw timing carry every stage
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Double Dragon III: The Sacred Stones
Enemies attack in fixed scripted patterns
Streets of Rage
Enemy gangs attack from fixed arcade patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Double Dragon III: The Sacred Stones
Stages never change between attempts
Streets of Rage
Spawns are essentially deterministic per stage
Streets of Rage leans a little harder on optimization, though the gap is small.
Double Dragon III: The Sacred Stones
Character-swap management and memorised layouts are the path through
Streets of Rage
One-credit clears come from learned positioning and patterns
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.