BC has been my toughest workouts to date although I don't see stars and feel sick anymore. I've been trying to do it at least once a month to measure my progress.
I tried something new last week from the premixes: BC everything except Core and THEN did Core only. This was much more manageable for me. In the regular workout, I think when I go down to the floor for core work all I want to do is lie there and rest. Its hard to jump up and get back at it again.
Next time, I think I'll do the Core work first, then the rest of BC.
As to the original question.. ;-) Bootcamp is a circuit workout w/ cardio, compound weight work, heavy upper body and core (8 cycles I think). PH is a straight strength training workout -- each part worked to failure before moving on.