head to head
Helldivers 2vsRain World
Helldivers 2 leans Optimization (Practiced Mastery); Rain World leans Variance (Twitch Chaos).
Helldivers 2Rain World
Axis by axis
Execution6 vs 6
Even - both lean on execution about the same.
Reads2 vs 1
Helldivers 2 leans harder on reads: Enemies scripted, no adaptive opponent
Variance6 vs 7
Rain World leans harder on variance: Creature placement and behavior shift unpredictably each cycle
Optimization7 vs 5
Helldivers 2 leans harder on optimization: Loadout and stratagem synergies deep
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

