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
Grand strategy wargame mixing turn-based empire play with real-time battles.

Optimization · Pure Optimization
A park management puzzle where understanding the guest happiness formula lets you solve each scenario optimally.
Medieval II: Total War leans Optimization (Pure Optimization); RollerCoaster Tycoon 2 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.
Medieval II: Total War
real-time battle micro is modest
RollerCoaster Tycoon 2
Track building is grid-based with modest placement precision demands
Medieval II: Total War leans a little harder on reads, though the gap is small.
Medieval II: Total War
campaign AI is exploitable and mappable
RollerCoaster Tycoon 2
Guest behaviour follows fixed preference scripts
Medieval II: Total War leans a little harder on variance, though the gap is small.
Medieval II: Total War
fog of war and event triggers hide some state
RollerCoaster Tycoon 2
Very little randomness once ride stats are understood
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Medieval II: Total War
economy, unit counters, and campaign map strategy dominate
RollerCoaster Tycoon 2
Pricing, ride stats, and park layout are near-perfectly 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.