head to head
vs
Call of DutyvsDiep.io
Call of Duty leans Execution (Practiced Mastery); Diep.io leans Execution (Practiced Mastery).
Call of DutyDiep.io
Axis by axis
Execution7 vs 6
Call of Duty leans harder on execution: Aim and reaction carry the scripted firefights
Reads3 vs 4
Diep.io leans harder on reads: Human opponents adjust positioning and engagements to you.
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.