GR07 BE is one IEM I haven't heard, but going from the GR07 MK2 the Dunu leans cooler in tonality, crisper, cleaner, (closer to H-100) tonality over GR07 which is warmer. It just has better detail and technical ability then GR07, like instrument separation and soundstage width, it's not to messed with at the $200 price tag.
To give you a better idea ...Since H-200 came out most of us agreed the T-Peos H-200 Hybrid is a step above GR07 MK2, and now... most of us who have/heard DN-1000 are rating it above H-200. So that puts things into perspective for you.
My friend did a review on the Dunu recently. He's a good little reviewer is our Lin.
Edited by H20Fidelity - 11/24/13 at 4:04am