HD650 - Elears just do everything better with the exception of the vocals - the HD650 edges it. I haven't heard any truly high end headphones, but even then I don't think I would prefer the way they deliver vocals. The Senn's just have this magical ability to make vocals sound so romantic and allow them to take center stage. It's a very mid-centric headphone, which is where the magic happens for me. Having said that, the Elear's still have that rich, full-bodied sound to the mids and vocals especially that I love. I eagerly await the day when Sennheiser pull their fingers out and give us a true successor to the HD650's. That would truly be endgame for me.
Elear - More comfortable than LCD2 but not as much as the HD650. Quite heavy and the headband presses down, you know you're wearing headphones. So easy to drive - I have to turn down the volume knob a few clicks to get a similar volume level compared to the other two. Build quality is a clear winner. Cable is unnecessarily long. A note hit harder in a song really does pop and can take you by surprise. Dynamic, punchy, better clarity and detail. Bass, mids and treble are delivered more evenly without any really overwhelming the other or taking center stage, although the bass and mids take more of a center stage than the treble. Arguably less engaging than the HD650 because of this, but still very, very enjoyable and musical (I've never been one to value technicality over musicality). Very smooth and non-fatiguing.