Hello'! I have only done them each once, but I also just acquired them in trade
I really love cardio pump fusion!! I also loved Kettlebell butts and guts, but it was really really hard for me, lol, and while I loved it , the DOMS set in for 2 days each day progressively worse, haha
But it wasnt that bad, now cardio Pump Fusion, I loooved!! It did not leave me with DOMS, but it was intense enough to feel " the burn"
And it seemed to move on to the next section before it became like, "omg", if that makes sense! I also loved the bootcamp mix on CPF and really enjoyed the kettlebell workouts, it was just all in all really a feel good workout for me!