It depends on how familiar you are with Cathe's choreography. The IMAX w/o's all follow the same format, the aerobic phase is a 32 count combo right and left repeated 3 times per side before blasts. Often Cathe pulls combos or variations of them from previous workouts so it's coming right at you with no build up or break down. The combos in LowMax are built up more gradually than those in IMAX so you master 8 or 16 counts then move on to the next part of the combo. I love both of these workouts, you really can't go wrong with either of them. I don't mind being on the learning curve for new workouts as it's good work for the brain (and heaven knows I need more of that! :+ )
Take Care
Laurie