System of a down or disturbed ?

Hey metal lovers i guess you all have heard about system of a down and disturbed both of the bands. They both are heavy metal and the vocal are really unique to make weird sounds. For example : system of down vocal always shout so loudly and on the other hand disturbed vocal has unique voice which unique weird voices i guess you have heard of down with the sickness oaaaaaa ... ???

So which one you preffer ?

no sorry i m not having the knowledge about that i cant give any response to it......

i like to listen the songs of system of down more than of disturbed.