head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Invisible, Inc. demands more variance.

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

Optimization · Pure Optimization
Solving procedurally generated corporate heists through precise resource and power management under escalating alarms.
Fallout: New Vegas leans Optimization (Pure Optimization); Invisible, Inc. leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Invisible, Inc.
Turn-based movement; no twitch demands whatsoever
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Scripted factions and enemies
Invisible, Inc.
Corporate guards patrol on scripted timers; no adaptive opponent
Invisible, Inc. leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Invisible, Inc.
Procedural floor layouts and alarm escalation add significant run variance
Invisible, Inc. leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Invisible, Inc.
Power allocation, agent pairing, and escape routing are the core 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.