head to head
vs
Alien SwarmvsBioShock 2
Alien Swarm leans Execution (Practiced Mastery); BioShock 2 leans Execution (Practiced Mastery).
Alien SwarmBioShock 2
Axis by axis
Execution5 vs 5
Even - both lean on execution about the same.
Reads0 vs 1
BioShock 2 leans harder on reads: Splicer AI scripted, not adaptive.
Variance3 vs 2
Alien Swarm leans harder on variance: Spawn timing varies modestly
Optimization5 vs 5
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.