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 · Systems & Chaos
Medieval dynasty sim with chaotic event-driven stories.

Optimization · Systems & Chaos
Turn-based squad tactics managing dice odds and positioning in 40K corridors.
Crusader Kings II leans Optimization (Systems & Chaos); Space Crusade leans Optimization (Systems & Chaos).
Space Crusade leans a little harder on execution, though the gap is small.
Crusader Kings II
pausable, no reflex
Space Crusade
Turn-based - no twitch demands at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
AI characters scripted not adaptive
Space Crusade
Multiplayer rewards limited reading of opponent moves
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
dynastic events, traits, intrigue
Space Crusade
Dice rolls drive combat outcomes significantly
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
succession, marriages, claims plannable
Space Crusade
Squad composition, positioning and mission tactics are the 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.