I don't think I've had any 'true' OEV on mxe, at high doses I do lose stereoscopic vision (i.e. I get weird visual distortions because of double vision- people having two eyeballs clustered under each eyebrow) and it also causes classic dissociative 'stretching' and 'shrinking' of your field of vision, as well as occassionally 'flattening' your vision into two dimensions (so when I'm lying in bed it looks like the duvet is melting down the wall). I don't think that counts as OEV? I have thought that I was having amazing OEVs, but really I was just so smashed that I didn't understand what a glass of iced tea was and thought it was the most amazingly vivid, realistic and beautiful OEV I'd ever been witness too. Imagine how excited I was when I worked out I could drink my hallucination!
CEV on the other hand, mxe trumps everything else than I've experienced. The CEV were more realistic and emersive during my first plugged 'm-hole' dose of mxe than they were during my first true breakthrough dmt experience. I've been the god to entire universes for billions of years that only existed with my eyes closed on mxe. Seriously, I thought I would be fine having taken dmt and pretty much all the other traditional psychedelics plus over a dozen psychedelic RCs including DOC and DOB, not to mention 1.2g DXM (with no tolerance) and plenty of experience in navigating the k-hole, but 100mg plugged when I didn't have a tolerance blew me the fuck away. Best dancing I ever did heh.