Based on reviews for the two game systems we have (Wii and PS3) I got Zumba 2 for Wii. I saw that the original Zumba for Wii just had a 2-d solid white image for the instructor, where in Zumba 2 they have a much more realistic looking person as the instructor. There were a few other things that I can't remember anymore that made me go right for Zumba 2. I'm pretty happy w/ it. I go to regular Zumba classes too and I am starting to slow down a bit w/ the pregnancy already (12 wks) and this lets me go a bit more at my own pace. Goodluck.
forgot to say that I think a lot of the songs and moves are the same, but my classes rarely go this "old school Zumba" and stick to the new stuff, so it is new to me. But, it is nice to feel better/like I'm getting good at the basic moves. Also, live instructors do a much better job at cueing changes, but not having other people exercising next to you takes away the pressure to dance perfectly.
Re: Zumba at home?
My blog
https://www.youtube.com/watch?v=KgpTXqmrGv4&feature=fvwrel
https://www.youtube.com/watch?v=XjJhuJV4ei8&feature=related
https://www.youtube.com/watch?v=r7rPI_y0HBE&feature=related
https://www.youtube.com/watch?v=One7UlYxbG0&feature=related
https://www.youtube.com/watch?v=ZU5sU0S4vlI
https://www.youtube.com/watch?v=DFFV5FNicnk&feature=related
https://www.youtube.com/watch?v=mYplRbpXmYM
here are some of my favorites. i have it for it on my wii but prefer these, they are more high intensity. Hope this helps