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

Optimization · Pure Optimization
A minimalist puzzle platformer about deducing box-chain solutions.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
BoxBoxBoy! leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
BoxBoxBoy!
Box creation and movement need no precision
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
BoxBoxBoy!
Solo puzzle game with no opponent
Fallout: New Vegas
Scripted factions and enemies
Fallout: New Vegas leans clearly harder on variance.
BoxBoxBoy!
Puzzles fully deterministic, nothing random
Fallout: New Vegas
Some loot and crit RNG
BoxBoxBoy! leans a little harder on optimization, though the gap is small.
BoxBoxBoy!
Deducing box-chain shapes to clear obstacles is the game
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.