Does anyone know the difference between this: http://www.amazon.com/Superlux-HD668B-Dynamic-Semi-Open-Headphones/dp/B003JOETX8/ref=sr_1_1?s=electronics&ie=UTF8&qid=1390968085&sr=1-1&keywords=Superlux+HD668B
The second costs less, but seems to be an updated model, is it better?
I believe the EVO version is simply less fatiguing because the highs aren't as harsh. I haven't tried the 668B but it looks like they just have more bass. Do note that these headphones need a lot of burn in. The 681 EVOs are probably the better overall.