NOPE!
silent Exhaust, is an Exhaust
exhuasts main sounds kum hota hai iska, stock exhaust is called silencer, because it does its job 
exhaust is free flow, even this silent exhaust is free flow, but the stock one is neither free flow nor does it have the bigger diameter of the piping.
so is the free flow exhausts, silent exhuasts have lesser noice compared to normal aftermarket exhausts.