I feel bad that no one has answered your question. Have you read the top sticky about the differences in plans?
http://www.3fatchicks.com/forum/weig...ver-years.html
The reason I go to the next plan, or change in plan when Weight Watchers unveils a new one is because I know they are doing it with my best interest in mind. They change plans because of new research in the medical, health and nutrition fields. And usually the change benefits me. I've been through 2 changes. I started with Momentum, switched to Points Plus when it was rolled out and then switched to 360 when that was rolled out. Admittedly, there wasn't a big change in 360, but there were additions that have helped.
I hope you'll consider doing Points Plus 360, WW wouldn't be implementing it if it weren't working!