I have never shot my bows next to other brands. I really don't think my bows are noisey at all. I use a flemish dacron and I serve my cat whiskers (which makes them more affective) and I really don't notice the noise.
I hope you've visited the Excal web site. This page is pretty accuratehttp://www.excaliburcrossbow.com/demo/m/content/article.php?content_id=153
Other than that either choice will be excellent!