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
Planning augmented routes through dense environments where augment investment and sequencing define efficiency.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Deus Ex: Mankind Divided leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Deus Ex: Mankind Divided leans a little harder on execution, though the gap is small.
Deus Ex: Mankind Divided
Takedown timing and combat aim have a real ceiling
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.
Deus Ex: Mankind Divided
Guards are scripted; no opponent models the player
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.
Deus Ex: Mankind Divided
Alert thresholds add some hidden-state wrinkle to infiltration
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.
Deus Ex: Mankind Divided
Praxis allocation and approach sequencing optimise mission completion
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.