head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more optimization; LEGO Battles demands more reads.

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

Optimization · Pure Optimization
A simplified RTS testing basic build-order economy with light multiplayer prediction.
Fallout: New Vegas leans Optimization (Pure Optimization); LEGO Battles leans Optimization (Pure Optimization).
Fallout: New Vegas leans a little harder on execution, though the gap is small.
Fallout: New Vegas
Shooter inputs with VATS assist
LEGO Battles
Stylus micro on DS is gentle, not twitch-defining
LEGO Battles leans clearly harder on reads.
Fallout: New Vegas
Scripted factions and enemies
LEGO Battles
Multiplayer skirmishes add light human prediction
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
LEGO Battles
Map fog and treasure hunts hide modest information
Fallout: New Vegas leans clearly harder on optimization.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
LEGO Battles
Build orders and base economy decide simplified RTS matches
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.