head to head
vs
Fallout 3vsPerfect World
Fallout 3 leans Optimization (Pure Optimization); Perfect World leans Optimization (Pure Optimization).
Fallout 3Perfect World
Axis by axis
Execution3 vs 2
Fallout 3 leans harder on execution: VATS-leaning combat, low aim demand
Reads1 vs 2
Perfect World leans harder on reads: Open-world PvP exists but gear usually decides it
Variance2 vs 2
Even - both lean on variance about the same.
Optimization7 vs 7
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.