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

Execution · Pure Mechanics
First-person physics platformer about leaping across a convoy of crashing trucks.

Execution · Practiced Mastery
The fan-favourite sequel with harder levels and deeper secrets.
Clustertruck leans Execution (Pure Mechanics); Donkey Kong Country 2: Diddy's Kong Quest leans Execution (Practiced Mastery).
Clustertruck leans a little harder on execution, though the gap is small.
Clustertruck
Frame-tight jumps across moving trucks
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.
Clustertruck
No opponent
Donkey Kong Country 2: Diddy's Kong Quest
Fixed enemy patterns, no adaptation
Clustertruck leans a little harder on variance, though the gap is small.
Clustertruck
Physics chaos makes truck piles unpredictable
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.
Clustertruck
Route lines and ability use for speedruns
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.