head to head
Fallout: New Vegas asks more than Q.U.B.E. 2, and the gap is execution.

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

Optimization · Pure Optimization
Puzzle sequel where glove powers paint blocks to solve physical room logic.
Fallout: New Vegas leans Optimization (Pure Optimization); Q.U.B.E. 2 leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Q.U.B.E. 2
Occasional timing on moving blocks only
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Q.U.B.E. 2
No adaptive element exists
Fallout: New Vegas leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Q.U.B.E. 2
Deterministic puzzles with full information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Q.U.B.E. 2
Glove-power combinations resolve to clean solutions
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.