head to head
InsurgencyvsNatural Selection 2
Insurgency leans Execution (Competitive PvP); Natural Selection 2 leans Execution (Grand Arena).
InsurgencyNatural Selection 2
Axis by axis
Execution8 vs 8
Even - both lean on execution about the same.
Reads6 vs 6
Even - both lean on reads about the same.
Variance3 vs 2
Insurgency leans harder on variance: No killcam or HUD hides enemy positions
Optimization4 vs 6
Natural Selection 2 leans harder on optimization: Tech trees, res flow, and lifeform timings
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

