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

Execution · Pure Mechanics
A Touhou fan metroidvania where a time-stopping maid weaves through scripted bullet hell.
Donkey Kong Country 2: Diddy's Kong Quest leans Execution (Practiced Mastery); Touhou Luna Nights leans Execution (Pure Mechanics).
Touhou Luna Nights leans a little harder on execution, though the gap is small.
Donkey Kong Country 2: Diddy's Kong Quest
Demanding jump chains and animal-buddy control
Touhou Luna Nights
Bullet-pattern dodging and time-stop knife play demand sharp hands
Touhou Luna Nights leans a little harder on reads, though the gap is small.
Donkey Kong Country 2: Diddy's Kong Quest
Fixed enemy patterns, no adaptation
Touhou Luna Nights
Boss patterns are fully scripted danmaku
Same score on variance - 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
Secret Lost World entrances hidden until found
Touhou Luna Nights
Fixed level layouts, little hidden randomness
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
Touhou Luna Nights
Learning patterns and time-stop resource management
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.