head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Warhammer 40,000: Gladius - Relics of War demands more variance.

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

Optimization · Pure Optimization
Racing to secure relics and optimize unit upgrade chains in a hostile hex-grid wargame.
Fallout: New Vegas leans Optimization (Pure Optimization); Warhammer 40,000: Gladius - Relics of War leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Warhammer 40,000: Gladius - Relics of War
Hex turn-based; no physical precision ceiling
Warhammer 40,000: Gladius - Relics of War leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Warhammer 40,000: Gladius - Relics of War
AI factions follow fixed expansion doctrines without adaptive modelling
Warhammer 40,000: Gladius - Relics of War leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Warhammer 40,000: Gladius - Relics of War
Random relic placement and event spawns add meaningful hidden unknowns
Warhammer 40,000: Gladius - Relics of War leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Warhammer 40,000: Gladius - Relics of War
Unit upgrade routing and resource building sequencing are deeply solvable
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.