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

Execution · Practiced Mastery
The fan-favourite sequel with harder levels and deeper secrets.

Execution · Practiced Mastery
A retro Sonic revival celebrating classic-era momentum design.
Donkey Kong Country 2: Diddy's Kong Quest leans Execution (Practiced Mastery); Sonic Mania 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.
Donkey Kong Country 2: Diddy's Kong Quest
Demanding jump chains and animal-buddy control
Sonic Mania
High-speed reaction platforming
Sonic Mania leans a little harder on reads, though the gap is small.
Donkey Kong Country 2: Diddy's Kong Quest
Fixed enemy patterns, no adaptation
Sonic Mania
No human opponent
Sonic Mania leans a little harder on variance, though the gap is small.
Donkey Kong Country 2: Diddy's Kong Quest
Secret Lost World entrances hidden until found
Sonic Mania
Mostly deterministic with hidden routes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong Country 2: Diddy's Kong Quest
Routes, DK coins, and bonuses fully mappable
Sonic Mania
Route knowledge dominates speedruns
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.