Ptpalpha,
First off I would like to say that in my opinion both are awsome creatures. I think that both are just a little burly for casual civilian carry. But hey, no big deal.
I firmly believe that the one that is easiest to carry is the one will be at hand in time of need. For me that happens to be the Commander. A Commander in hand beats a PH at home.
Beyond that I think about deployment. Which is easiest to access and bring to a ready position? Once again for me its the Commander. The knife is made to be accessed. Even without the wave that sucker opens with ease. The PH has those teeth on its spine. I spend an inordinate amount of time trying to clear my fingers of these when drawing and opening quickly. I know many PH fans will "rain" on this message but I still think that of the two the Commander is more user friendly.
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Never argue with a man that wears a size 5 hat.