head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Tastee: Lethal Tactics demands more reads.

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

Optimization · Pure Optimization
A simultaneous-turn tactics game testing positioning and predicting opponent commitments.
Fallout: New Vegas leans Optimization (Pure Optimization); Tastee: Lethal Tactics leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Tastee: Lethal Tactics
Planning phase, no twitch aiming required
Tastee: Lethal Tactics leans clearly harder on reads.
Fallout: New Vegas
Scripted factions and enemies
Tastee: Lethal Tactics
Simultaneous turns reward predicting human opponent moves
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
Tastee: Lethal Tactics
Low randomness, mostly deterministic resolution
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Tastee: Lethal Tactics
Precise positioning and timing of merc actions
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.