Culture: McK = Think they are the absolute best (high chance they are maybe?), they are criticised for using the same analysis over and over.BCG = 'We're more academic', they like to start from a blank sheet. Of course they also have an analyst team and an information database, so the difference with McK isn't 180 degrees, but it is an important nuance.Bain = The cool boys. Go here if you have purple hair or an heavy interest in private equity. (Warning: Due Diligence cases are loooooong hours!)WLB:Bain = BCG >> McK in my opinion.All 3 are very OK to join.