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
Medieval economy RTS where feeding your army matters more than commanding it.
Dungeon Keeper 2 leans Optimization (Pure Optimization); Knights and Merchants: The Shattered Kingdom 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.
Knights and Merchants: The Shattered Kingdom
Manual troop formations need some real-time handling.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dungeon Keeper 2
Hero waves and rival keepers run on scripts.
Knights and Merchants: The Shattered Kingdom
Campaign AI attacks on fixed triggers and timers.
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.
Knights and Merchants: The Shattered Kingdom
Enemy positions hidden until scouted, little else.
Knights and Merchants: The Shattered Kingdom leans a little harder on optimization, though the gap is small.
Dungeon Keeper 2
Dungeon layout, creature economy and research are solvable.
Knights and Merchants: The Shattered Kingdom
Food chains and serf logistics are the dominant solvable layer.
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.