what do boar bristles do to your hair and i dont know which one to pick because i dont know which one is better.. can u help me choose? i have thickish hair…

http://sallybeauty.com/Orangewood+Porcupine+Boar+Brush/JANDD9,default,pd.html?cgid=Hair10-03

http://sallybeauty.com/All+Boar+Cushion+Brush/SBS-896391,default,pd.html

I rock the 360 waves and I brush when im in the shower and my brush seems even weaker than it was days ago when I was using and im using it dry right now and it seems weak and its a boar bristle brush help please thnks