Check out my reviews: http://www.huntingnet.com/forum/tm.aspx?m=2629922

I thinkboth bows are extremely quiet for Speed bows. I did take time to set timing and adjust the short stop string suppressors. I know down through the years some of the bows I've seen supposedly ready to shoot at some shops made me shake my head in disbelief. Since both bows have the exact same String Suppressor I highly doubt any noise difference is coming from there.

Dan