There will be no difference in noise tillered even or positive on top (slightly).
I don't have all the answers as to why it will be noisier three under for the same bow. If you learn to use back tension when you shoot (not an overnight fix) and relax your hand and arm, there will be no more noise.
I shoot three under...when I use proper form, the bow is dead quiet...and when not, it can be kind a loud.
There is no correction that you can make to the bow to remedy this.
BigJIm