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
More giant clockwork sandboxes where mapping NPC schedules is the real skill.
Fallout: New Vegas leans Optimization (Pure Optimization); Hitman 2 (2018) 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 2 (2018)
Minimal dexterity needed with a solid plan
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Hitman 2 (2018)
Clockwork NPC loops, nothing adapts
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 2 (2018)
Mission stories hidden until explored
Hitman 2 (2018) leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Hitman 2 (2018)
Routing, disguises, and unlocks converge on solved runs
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.