I have used chord cobra 3, chameleon silver plus and atlas equator and all have sounded different. The atlas was open and airy but with a tendancy to sound a bit harsh, the cobra was nice, warm and smoth but lacked the detail and openess of the atlas, the chameloeon silver plus seems to be the best of all with warmth, more detail and no harshness to the treble or voices. Thats my limited experience. Im yet to do a back to back A-B-C comparison on them, but i will do at some point soon.