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
Crisp NES licensed platformer about chipmunks hurling crates at robots.

Execution · Practiced Mastery
Momentum-driven execution over fixed levels rewarding memorised routes.
Chip 'n Dale Rescue Rangers leans Execution (Practiced Mastery); Sonic the Hedgehog 3 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.
Chip 'n Dale Rescue Rangers
Tight jumps and box-throw timing
Sonic the Hedgehog 3
Holding speed through fixed hazards demands sharp reactions
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Chip 'n Dale Rescue Rangers
Enemies are simple fixed patterns
Sonic the Hedgehog 3
Badniks and bosses repeat identical scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Chip 'n Dale Rescue Rangers
Deterministic levels
Sonic the Hedgehog 3
Levels never change between runs
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Chip 'n Dale Rescue Rangers
Level memory and boss pattern knowledge
Sonic the Hedgehog 3
Route choice and emerald collection reward memorised play
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.