Is the Zeus's mids similar to Audio Technica's AD series (open) in any ways?
I'll try to track one down and give it a demo. Although @Dingding123 is right in that IEMs and headphones are hardly ever comparable, there are always nuances/emotions/stimuli that headphones and IEMs may mutually give when listened to with an open mind. I should be in an Audio Technica retailer's vicinity in a few days, so expect an update then.