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
Comic-panel beat 'em up notorious for punishing health drain and tough fights.

Execution · Pure Mechanics
A bullet-hell shooter testing precise dodging through fixed dense patterns.
Comix Zone leans Execution (Pure Mechanics); Rolling Gunner leans Execution (Pure Mechanics).
Rolling Gunner leans a little harder on execution, though the gap is small.
Comix Zone
Brutal one-life brawling demands clean play
Rolling Gunner
Dodging dense bullet patterns is the entire skill ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Comix Zone
Enemies follow fixed attack scripts
Rolling Gunner
Solo arcade, enemies are scripted not adaptive
Rolling Gunner leans a little harder on variance, though the gap is small.
Comix Zone
Everything is placed and scripted
Rolling Gunner
Patterns are fixed once learned, minimal randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Comix Zone
Panel routes and item use are memorizable
Rolling Gunner
Scoring routes and the rolling-gun mechanic reward planning
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.