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
The fan-favourite sequel with harder levels and deeper secrets.
Chip 'n Dale Rescue Rangers leans Execution (Practiced Mastery); Donkey Kong Country 2: Diddy's Kong Quest 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
Donkey Kong Country 2: Diddy's Kong Quest
Demanding jump chains and animal-buddy control
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
Donkey Kong Country 2: Diddy's Kong Quest
Fixed enemy patterns, no adaptation
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
Donkey Kong Country 2: Diddy's Kong Quest
Secret Lost World entrances hidden until found
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
Donkey Kong Country 2: Diddy's Kong Quest
Routes, DK coins, and bonuses fully mappable
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.
full breakdown
Chip 'n Dale Rescue Rangers →
full breakdown
Donkey Kong Country 2: Diddy's Kong Quest →