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

Optimization · Pure Optimization
A Napoleonic strategy game testing empire economy and battlefield formation play.
Dungeon Keeper 2 leans Optimization (Pure Optimization); Imperial Glory leans Optimization (Pure Optimization).
Dungeon Keeper 2 leans a little harder on execution, though the gap is small.
Dungeon Keeper 2
Slap-and-drop micro and possession combat need quick hands.
Imperial Glory
Pausable battles and turn-based empire management, minimal dexterity
Imperial Glory leans a little harder on reads, though the gap is small.
Dungeon Keeper 2
Hero waves and rival keepers run on scripts.
Imperial Glory
Human multiplayer battles allow some feinting, AI doesn't adapt
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.
Imperial Glory
Diplomacy outcomes add modest uncertainty
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.
Imperial Glory
Economy, research and Napoleonic battle formations are the solvable core
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.