I gotta go with what dynamike said-- Photons are photons and Hensel's photon's (or Broncolor's or Elinchron's or a host of other lighting manufacturers) aren't different than anyone else's photons.
As far as color temperature goes, if your ABs drift (color temp wise) at different power outputs it's just a matter of knowing your equipment and compensating. i shoot with Novatron monolights. Do they drift at various power outputs? Heck, I dunno. I don't really notice them getting, say, warmer at lower outputs. But if they do, I take back control of the color in post so i'm not really worried about it.
Personally, one of the biggest issues with me is recycle time. My novatrons recycle fast and when i've put a less expensive, lower-quality strobe in the mix, and it doesn't recycle the power as fast as my Novatrons, I get really annoyed.