head to head
Fallout: New Vegas asks more than Professor Layton vs. Phoenix Wright: Ace Attorney, and the gap is execution.

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

Optimization · Pure Optimization
Authored logic puzzles and contradiction hunting with zero execution demand.
Fallout: New Vegas leans Optimization (Pure Optimization); Professor Layton vs. Phoenix Wright: Ace Attorney leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Professor Layton vs. Phoenix Wright: Ace Attorney
Tapping answers has no physical component
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Professor Layton vs. Phoenix Wright: Ace Attorney
Witnesses are scripted, contradictions are authored
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Some loot and crit RNG
Professor Layton vs. Phoenix Wright: Ace Attorney
Testimony twists are hidden until revealed, then fixed
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Professor Layton vs. Phoenix Wright: Ace Attorney
Logic puzzles and contradiction-spotting are fully solvable
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.