Paradigm and Axiom's were founded under the same ground breaking design from Canada's NRC, so I can say they will have a similar sound. If you've heard the Studio lineup from them, that is similar to what you will hear from Axiom.
The Qs8's, in my opinion are hard to beat in terms of surround duty. They have been around for a long time, and have a huge following, even by non Axiom owners. The 4 drivers firing all in phase is unique to Axiom.
only thing of major difference is the cost. over $7500 for paradigm Studio 100's setup and just over $4400 for Axiom's M80's setup. In Canada that is
