head to head
FactoriovsX4: Foundations
Factorio leans Optimization (Pure Optimization); X4: Foundations leans Optimization (Pure Optimization).
FactorioX4: Foundations
Axis by axis
Execution2 vs 3
X4: Foundations leans harder on execution: Flying your own ship matters early, fleets later.
Reads0 vs 0
Even - both lean on reads about the same.
Variance1 vs 2
X4: Foundations leans harder on variance: Simulated wars create some unpredictability.
Optimization10 vs 10
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

