head to head
Fallout: New Vegas asks more than Viva Piñata: Trouble in Paradise, and the gap is execution.

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

Optimization · Pure Optimization
The expanded sequel adds desert and arctic piñatas to the garden-ecosystem puzzle.
Fallout: New Vegas leans Optimization (Pure Optimization); Viva Piñata: Trouble in Paradise leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Viva Piñata: Trouble in Paradise
Same gentle gardening controls
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Viva Piñata: Trouble in Paradise
Creature behavior is rule-based, not adaptive
Viva Piñata: Trouble in Paradise leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Viva Piñata: Trouble in Paradise
New biome visitors still arrive with some chance
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Viva Piñata: Trouble in Paradise
Expanded species web deepens the requirement-solving game
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.