head to head
Fallout: New Vegas asks more than Super Sanctum TD, 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 tower-defense game about building optimal mazes and tower combinations.
Fallout: New Vegas leans Optimization (Pure Optimization); Super Sanctum TD leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Super Sanctum TD
Placing towers needs no twitch; abilities are light
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Super Sanctum TD
Enemy waves are scripted, not adaptive minds
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
Super Sanctum TD
Wave composition is predictable once learned
Super Sanctum TD leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Super Sanctum TD
Maze design and tower synergy are the entire 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.