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 turn-based 4X strategy game about optimizing civilization growth and tech trees over centuries.

Optimization · Pure Optimization
A castle-building strategy game where economic optimization and defense planning is the whole test.
Call to Power II leans Optimization (Pure Optimization); Stronghold leans Optimization (Pure Optimization).
Stronghold leans a little harder on execution, though the gap is small.
Call to Power II
none, purely turn-based decisions
Stronghold
minimal, mostly clicking and management
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call to Power II
limited prediction of AI civ behavior
Stronghold
AI opponents are scripted, minor prediction
Call to Power II leans a little harder on variance, though the gap is small.
Call to Power II
random events and combat outcome rolls
Stronghold
minor resource and raid randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call to Power II
deep civilization-building and tech optimization
Stronghold
economy and castle-building near-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.