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

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

Optimization · Pure Optimization
Open-ended puzzles testing vocabulary-driven creative problem-solving more than any reflex.
Fallout: New Vegas leans Optimization (Pure Optimization); Scribblenauts Unlimited leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Scribblenauts Unlimited
Typing words is the only physical demand
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Scribblenauts Unlimited
Puzzle NPCs are static requests, not minds
Fallout: New Vegas leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Scribblenauts Unlimited
Puzzles are visible; nothing meaningful is hidden
Fallout: New Vegas leans clearly harder on optimization.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Scribblenauts Unlimited
Finding objects that satisfy puzzle constraints is creative problem-solving
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.