head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
Charming diorama puzzler about routing a jumpless Toad to each star.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Captain Toad: Treasure Tracker leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans a little harder on execution, though the gap is small.
Captain Toad: Treasure Tracker
Gentle navigation, no jumping, light timing
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Captain Toad: Treasure Tracker
No adaptive opposition anywhere
Fallout: New Vegas
Scripted factions and enemies
Fallout: New Vegas leans a little harder on variance, though the gap is small.
Captain Toad: Treasure Tracker
Everything is visible and fixed
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.
Captain Toad: Treasure Tracker
Rotating dioramas to solve fixed route puzzles
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.