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.

Optimization · Pure Optimization
Villainous dungeon management game about luring monsters and crushing do-gooder heroes.

Optimization · Pure Optimization
Sitcom puzzle game about rigging perfect prank chains around a fixed routine.
Dungeon Keeper 2 leans Optimization (Pure Optimization); Neighbours from Hell leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dungeon Keeper 2
Slap-and-drop micro and possession combat need quick hands.
Neighbours from Hell
Timing pranks between patrol windows
Dungeon Keeper 2 leans a little harder on reads, though the gap is small.
Dungeon Keeper 2
Hero waves and rival keepers run on scripts.
Neighbours from Hell
The neighbour loops a fixed routine
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dungeon Keeper 2
Hero party timing and creature moods vary mildly.
Neighbours from Hell
Routine unknown on first attempt, then converges
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dungeon Keeper 2
Dungeon layout, creature economy and research are solvable.
Neighbours from Hell
Sequencing pranks for maximum combo rating
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.