head to head
Fallout: New Vegas asks more than RollerCoaster Tycoon 2, and the gap is execution.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.

Optimization · Pure Optimization
A park management puzzle where understanding the guest happiness formula lets you solve each scenario optimally.
Fallout: New Vegas leans Optimization (Pure Optimization); RollerCoaster Tycoon 2 leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
RollerCoaster Tycoon 2
Track building is grid-based with modest placement precision demands
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
RollerCoaster Tycoon 2
Guest behaviour follows fixed preference scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Some loot and crit RNG
RollerCoaster Tycoon 2
Very little randomness once ride stats are understood
RollerCoaster Tycoon 2 leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.