head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Solasta: Crown of the Magister demands more variance.

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

Optimization · Pure Optimization
A faithful D&D 5E dungeon crawl where concentration management and class synergies define optimal parties.
Fallout: New Vegas leans Optimization (Pure Optimization); Solasta: Crown of the Magister leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Solasta: Crown of the Magister
D&D 5E turn-based rules fully automate dice; no twitch exists
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
Solasta: Crown of the Magister
All dungeon enemies follow scripted AI behaviour and patrol routes
Solasta: Crown of the Magister leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Solasta: Crown of the Magister
Roll randomness and hidden enemy positions add unknowns to each encounter
Solasta: Crown of the Magister leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Solasta: Crown of the Magister
5E class synergies, concentration management and high-ground exploitation are 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.