I had the same dilema just 2 days ago when I ask ClieOS about the ba200 and gr07. I bought the ba200 yesterday to try it out for myself and I have to say I'm impressed. Although both have similar sound signature the presentation is very different. The ba200 feels slightly more intimate with vocals and I can hear a tad more detail and shimmer in the treble. Treble is also noticeably smoother on the ba200. The ba200 sounds slightly thicker and fuller on ba200 than on the gr07. The vocals are definitely more forward than the gr07. The gr07 has an airier presentation and everything just sound noticeably more open though I'm not suggesting the ba200 sounded congested. I'm not sure how to describe the bass but I do prefer the gr07 slightly as it seems more palpable? The gr07 also has better texture and the layering is still unmatched by everything I've heard. I do not have a conclusion at this stage as I need more time to evaluate both iem but I will say the ba200 are definitely worth buying as they offer a very different flavor from gr07.
Edited by helljudgement - 6/6/12 at 12:21pm