head to head
vs
Killzone 2vsPerfect Dark Zero
Killzone 2 leans Execution (Pure Mechanics); Perfect Dark Zero leans Execution (Competitive PvP).
Killzone 2Perfect Dark Zero
Axis by axis
Execution8 vs 7
Killzone 2 leans harder on execution: Weighty gunplay punishes imprecise aim hard
Reads4 vs 5
Perfect Dark Zero leans harder on reads: Online opponents flank, fake and adapt constantly
Variance2 vs 2
Even - both lean on variance about the same.
Optimization4 vs 4
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.