head to head
Fallout: New Vegas asks more than IXION, and the gap is execution.

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

Optimization · Pure Optimization
Grim space colony sim about keeping a generation-ship station from collapsing.
Fallout: New Vegas leans Optimization (Pure Optimization); IXION leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
IXION
Pause-friendly station management
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
IXION
Events follow story scripts
IXION leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
IXION
System events and exploration outcomes vary
IXION leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
IXION
Hull sectors, power, and population logistics dominate
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.