head to head
vs
Destiny 2vsDiablo III
Destiny 2 leans Optimization (Practiced Mastery); Diablo III leans Optimization (Pure Optimization).
Destiny 2Diablo III
Axis by axis
Execution6 vs 4
Destiny 2 leans harder on execution: Gunplay matters but raids forgive mechanics.
Reads2 vs 1
Destiny 2 leans harder on reads: PvE is scripted; Crucible has light adaptation.
Variance5 vs 5
Even - both lean on variance about the same.
Optimization8 vs 9
Diablo III leans harder on optimization: Set bonuses and paragon levelling are almost entirely 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.