head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; The Legend of Heroes: Trails of Cold Steel II demands more variance.

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

Optimization · Pure Optimization
A narrative-heavy turn-based RPG deepening Cold Steel's orbment and Link optimisation with Brave Order resource management.
Fallout: New Vegas leans Optimization (Pure Optimization); The Legend of Heroes: Trails of Cold Steel II leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
The Legend of Heroes: Trails of Cold Steel II
Turn-based combat; no action timing required
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
The Legend of Heroes: Trails of Cold Steel II
Scripted enemy AI throughout; no adaptive opponent
The Legend of Heroes: Trails of Cold Steel II leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
The Legend of Heroes: Trails of Cold Steel II
Quartz recipe unlocks and drop rates add light RNG
The Legend of Heroes: Trails of Cold Steel II leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
The Legend of Heroes: Trails of Cold Steel II
Turn-order stacking, brave order usage, and ARCUS builds reward deep planning
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.