head to head
Fallout: New Vegas asks more than Dragon Age: Origins, and the gap is execution.

Optimization · Pure Optimization
A pausable tactics RPG where party build and tactic-slot planning win fights.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Dragon Age: Origins leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Dragon Age: Origins
Tactical pause combat, low input demand
Fallout: New Vegas
Shooter inputs with VATS assist
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Age: Origins
Enemy AI is scripted
Fallout: New Vegas
Scripted factions and enemies
Dragon Age: Origins leans a little harder on variance, though the gap is small.
Dragon Age: Origins
Hidden rolls and loot tables
Fallout: New Vegas
Some loot and crit RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Age: Origins
Tactics slots, builds, party synergy dominate
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.