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

Optimization · Pure Optimization
A flash puzzle about rolling a rectangular block into the hole without falling off.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Bloxorz leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Bloxorz
Deliberate moves; no time pressure.
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Bloxorz
No opponent at all.
Fallout: New Vegas
Scripted factions and enemies
Fallout: New Vegas leans clearly harder on variance.
Bloxorz
Levels are fixed and fully visible.
Fallout: New Vegas
Some loot and crit RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bloxorz
Each level is a literally solvable move puzzle.
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.