head to head
vs
Slay the SpirevsX-COM: UFO Defense
Slay the Spire leans Optimization (Systems & Chaos); X-COM: UFO Defense leans Optimization (Systems & Chaos).
Slay the SpireX-COM: UFO Defense
Axis by axis
Execution0 vs 1
X-COM: UFO Defense leans harder on execution: Turn-based; only inventory clicking
Reads1 vs 0
Slay the Spire leans harder on reads: Enemy intents shown; behaviour scripted, not adaptive.
Variance7 vs 6
Slay the Spire leans harder on variance: Card and relic offers drive every run.
Optimization9 vs 8
Slay the Spire leans harder on optimization: Deck shaping and combat math are 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.