I much prefer the color-scheme for ImpulseDriven over JoeUser. Quite honestly, though, the interfaces are almost identical (it's just the brown vs. grey thing). They seem to look and operate the exact same (in my limited usage).
I do wish at least that the "Life Journals" category were represented on ImpulseDriven. I can understand the Religious and Political categories being dropped, but the Life Journals, to me at least, are sort of the core of blogging in general.
Still, I like ImpulseDriven, and I like that it can be so easily and cleanly accessed from within Impulse (yeah, I get it).