Is Heroes VI better than all the KB games?

[Metroplex]

Hi, I am still waiting for my pre-order of the Heroes VI collector's edition to arrive so I haven't played this game yet.
But from what I read in the forums it's a buggy mess, and don't get me started on the need to be online to start the game...
But what I really want to know is, those of you that have played it, is it better than King's Bounty? Or is King's Bounty miles ahead?
Your pros/cons, etc. will be interesting to read.