I have a CB 6048 and I can tell you I'm very happy with it, and have had no problems. I can also tell you my next door neighbor, (my brother) has had a CB 6048 (the earlier version) for at least 10 years, burns garbage in it, has only added the additives once or twice, never checks the PH or anything, boils it often, and has also had no problems. I'm sure the Hawken is a great unit also, but can't give you any feedback on them.
It might be hard for one of us to give you a good comparison since most of us have probably never owned both.