head to head
Fallout: New Vegas asks more than Breath of Fire IV, and the gap is execution.

Optimization · Pure Optimization
A dual-protagonist JRPG where mastering cross-character fusion and combo optimization resolves all scripted encounters.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Breath of Fire IV leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Breath of Fire IV
Menu combat; combo system has minor sequencing
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Breath of Fire IV
No adaptive foes; all patterns are fixed
Fallout: New Vegas
Scripted factions and enemies
Breath of Fire IV leans a little harder on variance, though the gap is small.
Breath of Fire IV
Random encounter variance and some enemy action randomness present
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.
Breath of Fire IV
Cross-Ryu fusion, combo chains, and AP economy are the solvable layer
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.