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

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

Optimization · Pure Optimization
A cyberpunk tactics game where karma allocation and archetype synergies define run efficiency.
Fallout: New Vegas leans Optimization (Pure Optimization); Shadowrun Returns leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Shadowrun Returns
Turn-based tactical combat; cover positioning deliberate not reactive
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
Shadowrun Returns
Enemy IC and guards run scripted patrol and aggro routines
Shadowrun Returns leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Shadowrun Returns
Hidden enemy positioning and matrix node layouts provide first-run unknowns
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Shadowrun Returns
Karma allocation and archetype synergies have known dominant configurations
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.