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 deep tower defense about popping waves of balloons with monkey towers.

Optimization · Pure Optimization
A park management puzzle where understanding the guest happiness formula lets you solve each scenario optimally.
Bloons TD 6 leans Optimization (Pure Optimization); RollerCoaster Tycoon 2 leans Optimization (Pure Optimization).
RollerCoaster Tycoon 2 leans a little harder on execution, though the gap is small.
Bloons TD 6
Placement clicks only; no dexterity ceiling
RollerCoaster Tycoon 2
Track building is grid-based with modest placement precision demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bloons TD 6
Bloon waves are fixed and known
RollerCoaster Tycoon 2
Guest behaviour follows fixed preference scripts
RollerCoaster Tycoon 2 leans a little harder on variance, though the gap is small.
Bloons TD 6
Wave order is deterministic; tiny targeting randomness
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.
Bloons TD 6
Tower placement, upgrades, and economy are near-solvable
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.