In my opinion they are close. In listening to some classical and jazz I know well, I think I can hear better separation on the BA200s but the GR07s may paint a better overall picture. It seems a touch more cohesive. Width and depth seem very close. I have read others say there is a big difference with the BA200s giving better depth and the GR07s having better width. I don't hear a huge difference.
In all honesty, if it weren't for the isolation and tip issues with the GR07s, I would have never even looked after having them. I like them alot and think they are a better build quality IEM. For the money they are exceptionally hard to beat. I like the BA200s better in the highs and overall balance department. I like the GR07 BE in the bass, cable and build quality. Still isolation is one of my top 2-3 priorities. I get sound as good or better than the GR07s in most areas with considerably better isolation and tip selection. Add to that the cost is $40 cheaper and I will stick with these. Ultimately I would prefer some Shure SE535 LTDs as they are my favorite IEM but I am not willing to stretch to that amount of money right now. I'm getting 95% (IMO) of their performance in all areas with a little lower build quality.