head to head
vs
Call of Duty: Modern Warfare 2vsDay of Defeat: Source
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Day of Defeat: Source leans Execution (Competitive PvP).
Call of Duty: Modern Warfare 2Day of Defeat: Source
Axis by axis
Execution8 vs 8
Even - both lean on execution about the same.
Reads6 vs 6
Even - both lean on reads about the same.
Variance3 vs 2
Call of Duty: Modern Warfare 2 leans harder on variance: Spawn flips and killstreak randomness
Optimization5 vs 4
Call of Duty: Modern Warfare 2 leans harder on optimization: Killstreak economy, loadout and map knowledge
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.