Is there any chance to get a comparison between companies who use McKinsey and ones that don't? Compare stock prices, profitability, public image, long term pro

Is there any chance to get a comparison between companies who use McKinsey and ones that don't? Compare stock prices, profitability, public image, long term prospects ... This could become a nice Rorschach test, where eveybody can come to different conclusions based on which metrics they pick as important.