I have all the TJ workouts. I think they are NOT the same or even can compare to Cathe's Kickboxing. They have a different focus. Well, actually , Chalene says you can do it the way you choose. But the group's focus is to have fun with it, makes it more dancey/party-ish, and sweat in the meantime (and you do!) . She also says you can treat it as a sports focus, and do it more Kickboxing style. But it's YOUR choice.
I like the dancy/party focus for cardio for a change up sometimes.
The moves REALLY focus on your Core though. I always get DOMS in my entire core after I do a TJ! (cardio)
I have both Ball workouts , and love the Core one. It has my very favorite cardio piece in it. It's so fun and you I really get into it. I wasn't a fan of the Total Body Ball Workout though. it wasn't challenging to me, and I think I've only done it once or twice.
~Chris