Malouda had 13 goals, Zhirkhov had zero. Malouda also had 3.1 key passes pr game dwarfing Zhirkhov's 0.9, he even had more crosses than Zhirkhov. The assists are most likely more a result of accurate shooting from the strikers than better passing.
Yeah Malouda is good for key passes, but what was his shots to goal ratio? I don't know it myself, but I'm sure it will be absolutely terrible. And Zhirkov doesn't play anywhere near as high up as Malouda so isn't going to get as many key passes. Zhirkov play centrally mostly so I would hope Malouda would have more crosses than Zhirkov. And the last point - what?