head to head
Fallout: New Vegas asks more than E.T. the Extra-Terrestrial, and the gap is optimization.

Optimization · Pure Optimization
The infamous Atari 2600 adventure that is trivial once its obscure rules are known.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
E.T. the Extra-Terrestrial leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
E.T. the Extra-Terrestrial
Clumsy pit navigation, little dexterity
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
E.T. the Extra-Terrestrial
No adaptive opposition
Fallout: New Vegas
Scripted factions and enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
E.T. the Extra-Terrestrial
Item locations vary per game
Fallout: New Vegas
Some loot and crit RNG
Fallout: New Vegas leans clearly harder on optimization.
E.T. the Extra-Terrestrial
Knowing the obtuse zone rules solves it quickly
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.