head to head
vs
Fallout SheltervsInfra
Fallout Shelter leans Optimization (Pure Optimization); Infra leans Optimization (Systems & Chaos).
Fallout ShelterInfra
Axis by axis
Execution0 vs 1
Infra leans harder on execution: Walking and photographing needs no dexterity
Reads0 vs 0
Even - both lean on reads about the same.
Variance4 vs 4
Even - both lean on variance about the same.
Optimization7 vs 6
Fallout Shelter leans harder on optimization: Dweller stats and room layout are fully solvable
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.