Just picked a pair from the mp4nation "2-day" sale for <$100. I had the Vsonic GR07 so I thought I'd try some armature IEM for a change. Overall sound pretty similar in my opinion. The B2 definitely has more details because it can produce those fast notes individually whereas the GR07 will mash it together once the speed goes up. People say the bass are these are weak but they are alright to me. The attack is very prominent and sounds better than the GR07 but after that it just goes splat. For most music I listen to this is enough bass. The highs like cymbal sound a lot more crisp and detailed. I dono if my tips are worn out on the GR07 or what, but the B2 requires 2 less step on the volume to achieve the same loudness and the B2 seals better so my head is more filled with the music. I do like all the accessory it comes with, and I really like it is worn cord up like my GR07. I think I'll switch them around for daily use as either one sound good to me.
Glad you enjoy it. I agree that the details with the B2 are just incredible. A couple months ago I sold off alot of my IEMs when I got my Westone 4s but the B2 definitely stayed. What tips are you using with them?