head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Final Fantasy Tactics demands more variance.

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

Optimization · Pure Optimization
A deep optimization puzzle solved through job combinations and CT-manipulation on fixed maps.
Fallout: New Vegas leans Optimization (Pure Optimization); Final Fantasy Tactics leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Final Fantasy Tactics
No twitch; CT-tick positioning demands spatial planning only
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Scripted factions and enemies
Final Fantasy Tactics
CPU job/action selection is fixed and fully predictable
Final Fantasy Tactics leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Final Fantasy Tactics
Random drops and some proc rates exist but rarely swing outcomes
Final Fantasy Tactics leans clearly harder on optimization.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Final Fantasy Tactics
Job mastery, ability stacking, and CT manipulation are near-perfectly 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.