Nutri-System versus Atkins?

One More diet questions today and that is it I promise! I was wondering if anyone had tried both of these diets and which one worked best and why? I have not tried nutri-system but I was reading some information on the web site and it does not look too bad. I am in desperate need of dropping 20 pounds by February 10th (getting married!). Please no exercise advice or telling me why atkins is bad for my health. Thanks so much!