head to head
Fallout: New Vegas asks more than Nancy Drew: Midnight in Salem, 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 point-and-click mystery testing deduction and puzzle-solving to solve a case.
Fallout: New Vegas leans Optimization (Pure Optimization); Nancy Drew: Midnight in Salem leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Nancy Drew: Midnight in Salem
Point-and-click interaction, no twitch demand
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Nancy Drew: Midnight in Salem
Scripted suspects, no adaptive opponent
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
Nancy Drew: Midnight in Salem
Hidden clues revealed by investigation, then mapped
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Nancy Drew: Midnight in Salem
Solving puzzles and assembling clues is the core
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.