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.

Optimization · Pure Optimization
A physics puzzle game testing projectile angle and aim to demolish castles.

Optimization · Pure Optimization
Villainous dungeon management game about luring monsters and crushing do-gooder heroes.
Crush the Castle leans Optimization (Pure Optimization); Dungeon Keeper 2 leans Optimization (Pure Optimization).
Crush the Castle leans a little harder on execution, though the gap is small.
Crush the Castle
Release timing of the trebuchet needs some precision
Dungeon Keeper 2
Slap-and-drop micro and possession combat need quick hands.
Dungeon Keeper 2 leans a little harder on reads, though the gap is small.
Crush the Castle
Solo physics puzzle, no opponent to predict
Dungeon Keeper 2
Hero waves and rival keepers run on scripts.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crush the Castle
Deterministic physics, minimal randomness
Dungeon Keeper 2
Hero party timing and creature moods vary mildly.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crush the Castle
Finding optimal projectile angles to topple structures is core
Dungeon Keeper 2
Dungeon layout, creature economy and research are solvable.
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.