head to head
Condemned: Criminal OriginsvsS.T.A.L.K.E.R.: Clear Sky
Condemned: Criminal Origins leans Execution (Practiced Mastery); S.T.A.L.K.E.R.: Clear Sky leans Optimization (Practiced Mastery).
Condemned: Criminal OriginsS.T.A.L.K.E.R.: Clear Sky
Axis by axis
Execution5 vs 5
Even - both lean on execution about the same.
Reads1 vs 1
Even - both lean on reads about the same.
Variance4 vs 5
S.T.A.L.K.E.R.: Clear Sky leans harder on variance: Dynamic faction war and emission RNG hide outcomes
Optimization5 vs 6
S.T.A.L.K.E.R.: Clear Sky leans harder on optimization: Upgrade economy and territory routing reward planning
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

