While loudspeaker manufacturers drivers often look alike the different lines do often use different uni-q looks the same, but are built to a lower price as are the cabinets. I had a pair of q5’s a while back and they sounded better than the line above, xq I think…I was using a low power avr and the q’s just sounded good better. The thing I’ve noticed about speaker lines is the more expensive they are the more demanding of source they also are.