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

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

Optimization · Pure Optimization
A narrative turn-based tactics game testing positioning and choices across a procedural journey.
Fallout: New Vegas leans Optimization (Pure Optimization); Pendragon leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Pendragon
Moving pieces on a grid has no twitch demand
Pendragon leans clearly harder on reads.
Fallout: New Vegas
Scripted factions and enemies
Pendragon
Enemy AI is tactical but not deeply adaptive to you
Pendragon leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Pendragon
Procedural encounters and outcomes add randomness
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Pendragon
Positioning, narrative choices and tactical planning win 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.