head to head
vs
Gears of War 2vsKillzone 2
Gears of War 2 leans Execution (Practiced Mastery); Killzone 2 leans Execution (Pure Mechanics).
Gears of War 2Killzone 2
Axis by axis
Execution7 vs 8
Killzone 2 leans harder on execution: Weighty gunplay punishes imprecise aim hard
Reads4 vs 4
Even - both lean on reads about the same.
Variance2 vs 2
Even - both lean on variance about the same.
Optimization5 vs 4
Gears of War 2 leans harder on optimization: Power-weapon timing and positioning 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.