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

Execution · Practiced Mastery
Score-attack remix of Pac-Man built around herding huge ghost trains at high speed.
Comix Zone leans Execution (Pure Mechanics); Pac-Man Championship Edition DX 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
Pac-Man Championship Edition DX
Blistering speed demands frame-tight cornering
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
Pac-Man Championship Edition DX
Sleeping ghosts follow deterministic trains
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Comix Zone
Everything is placed and scripted
Pac-Man Championship Edition DX
Board layouts are fixed and learnable
Pac-Man Championship Edition DX leans a little harder on optimization, though the gap is small.
Comix Zone
Panel routes and item use are memorizable
Pac-Man Championship Edition DX
Routing ghost trains for maximum score chains
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.