Zumba, which is best DVDs or the wii one.?

Vivalebeaver

I go to class once a week but want to do more in-between classes. I've already got the wii one which I like but I am getting a bit bored of it and also don't think it's as good a work out as a class. Are the DVDs a better workout? Are they worth spending the money on ifi already have the wii version?