Hi Nora,
I only have Jillians Yoga Meltdown so I can't compare the two. What I can tell you is the JM Yoga Meltdown is not "traditional" yoga. Jillian takes a more athletic approach and does what she calls "repping it out". So for a pose say Warrior, she will have you "rep it out" before holding the pose. I've done Level 1 several times but Level 2 only once. I like the DVD and I like Jillian in this workout. Hope this helps.
Maria
ETA: FWIW - I don't like traditional Yoga so that may have affected my like for the workout.