head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.

Optimization · Pure Optimization
Sandbox assassination at its purest: stage the perfect accident and walk away.
Fallout: New Vegas leans Optimization (Pure Optimization); Hitman: Blood Money leans Optimization (Pure Optimization).
Fallout: New Vegas leans a little harder on execution, though the gap is small.
Fallout: New Vegas
Shooter inputs with VATS assist
Hitman: Blood Money
Modest aim and sneak demands once a plan exists
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Hitman: Blood Money
Crowds and guards run fixed routines
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
Hitman: Blood Money
Accident opportunities hidden until discovered
Hitman: Blood Money leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Hitman: Blood Money
Accident-kill routing is a near-solvable planning puzzle
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.