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

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

Execution · Practiced Mastery
An arcade isometric shooter testing twitch execution and loadout mastery for score.
Comix Zone leans Execution (Pure Mechanics); Kill Knight 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.
Comix Zone
Brutal one-life brawling demands clean play
Kill Knight
Ultra-fast isometric shooting and reload timing define mastery
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
Kill Knight
Horror swarms follow fixed spawn logic
Kill Knight leans a little harder on variance, though the gap is small.
Comix Zone
Everything is placed and scripted
Kill Knight
Arena waves vary slightly between attempts
Kill Knight leans a little harder on optimization, though the gap is small.
Comix Zone
Panel routes and item use are memorizable
Kill Knight
Loadout synergy and scoring systems reward deep 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.