I do. It's easy. Razer Surround to me has NO rear positional accuracy, at all. The soundstage is a half moon, with the lit part being in front of you. All rear positional cues are basically going through your head instead of behind you. CMSS-3D makes a much easier distinction between what's in front and what's behind, though I still don't think it touches Dolby Headphone or even THX Tru Studio which do an even better job of portraying rear positional cues. The good thing about CMSS-3D is that it's not as processed sounding as the latter two, so I'd choose it over stereo, if only because it makes some sort of attempt to differentiate between front and back. Razer surround is... well, it's free for a reason. Razer Surround is like Stereo 1.5. It does a good job portraying side to front cues, but does little to nothing for things behind you in the virtual space. In that vid, the positional cues on the Razer weren't even aligned with the actual placement.