head to head
Fallout: New Vegas asks more than Kingdom Rush, 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 genre-defining cartoon tower defense with crunchy upgrades and fixed waves begging for perfect solutions.
Fallout: New Vegas leans Optimization (Pure Optimization); Kingdom Rush leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Kingdom Rush
Light micro of hero and rally points
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Kingdom Rush
Wave compositions are fixed and previewable
Fallout: New Vegas leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Kingdom Rush
Almost fully deterministic waves
Kingdom Rush leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Kingdom Rush
Tower placement and upgrade routes are 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.