ChaLean compared to P90X ???

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I finished my first round of P90X a little over a month ago and am on my second round. I am doing my own version, modified for building muscle mass, plus throwing in some P90X Plus workouts.

Once this round is over, I will probably want to change it up a little just to keep it interesting. I've heard some great things about ChaLean Extreme. Can anyone who's done both give me their observations? How do the two programs compare in terms of difficulty, focus on strength training vs. cardio vs. core vs.... etcetera!

Also curious about the nutrition plan.

Thanks!

Mike