head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
A traditional licensed platformer testing jump timing across fixed, memorisable levels.

Execution · Practiced Mastery
Breakout reflexes across four paddles with Kirby power timing.
Disney's Hercules Action Game leans Execution (Practiced Mastery); Kirby's Block Ball 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.
Disney's Hercules Action Game
Herculean difficulty demands precise jumps and sword timing
Kirby's Block Ball
Four-paddle ball control and timed Kirby powers test reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Disney's Hercules Action Game
Enemies follow simple fixed attack scripts
Kirby's Block Ball
Blocks and bosses are fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Disney's Hercules Action Game
Level layouts are fixed once played
Kirby's Block Ball
Ball physics are deterministic from paddle contact
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Disney's Hercules Action Game
Memorising level hazards and power-up locations
Kirby's Block Ball
Power usage and block routing reward stage knowledge
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.