i like the b/w one a bit. But i like the colored one a bit, too. B/W i think. Yes B/W just a bit more. Nice job man.
They are both too bright and oversharpened. I'd pick the B&W one, it's easier to look at. The font is also not very appealing to me. I like the effect on it, but that's about it. Besides the little empty spaces as well, this is a nice sig regardless. Nice originality as well.