head to head
vs
Prototype 2vsThe Guardian Legend
Prototype 2 leans Execution (Practiced Mastery); The Guardian Legend leans Execution (Practiced Mastery).
Prototype 2The Guardian Legend
Axis by axis
Execution6 vs 7
The Guardian Legend leans harder on execution: Bullet-dodging shmup corridors and boss patterns
Reads1 vs 0
Prototype 2 leans harder on reads: Blackwatch and infected never adapt
Variance2 vs 2
Even - both lean on variance about the same.
Optimization5 vs 5
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.