head to head
Fallout: New Vegas asks more than CSI: Deadly Intent, and the gap is execution.

Optimization · Pure Optimization
A forensic point-and-click about collecting evidence and matching it to scripted suspects.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
CSI: Deadly Intent leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
CSI: Deadly Intent
Pointing and clicking, no twitch 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.
CSI: Deadly Intent
Suspects give scripted responses, not adapting
Fallout: New Vegas
Scripted factions and enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
CSI: Deadly Intent
Evidence locations unknown until scenes are searched
Fallout: New Vegas
Some loot and crit RNG
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
CSI: Deadly Intent
Collecting and matching evidence to suspects solves cases
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.