head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Tiny Metal: Full Metal Rumble demands more reads.

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

Optimization · Pure Optimization
A turn-based tactics game about maneuvering units to outmatch the enemy.
Fallout: New Vegas leans Optimization (Pure Optimization); Tiny Metal: Full Metal Rumble leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Tiny Metal: Full Metal Rumble
Issuing unit orders has no twitch demand
Tiny Metal: Full Metal Rumble leans clearly harder on reads.
Fallout: New Vegas
Scripted factions and enemies
Tiny Metal: Full Metal Rumble
Human opponents reward predicting their advances
Tiny Metal: Full Metal Rumble leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Tiny Metal: Full Metal Rumble
Some combat rolls and fog add uncertainty
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
Tiny Metal: Full Metal Rumble
Unit composition, terrain and economy decide battles
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.