head to head
Day of Defeat: SourcevsGunZ: The Duel
Day of Defeat: Source leans Execution (Competitive PvP); GunZ: The Duel leans Execution (Pure Mechanics).
Day of Defeat: SourceGunZ: The Duel
Axis by axis
Execution8 vs 9
GunZ: The Duel leans harder on execution: K-style butterfly cancels demand extreme input speed; perfect inputs win alone
Reads6 vs 6
Even - both lean on reads about the same.
Variance2 vs 1
Day of Defeat: Source leans harder on variance: Known maps, minimal randomness beyond spawn waves
Optimization4 vs 3
Day of Defeat: Source leans harder on optimization: Class loadouts and lane control are quickly mapped
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

