Sorry, I can't answer your question but wondered if you would get a better response if you posted your question under the Slimming Clubs section - there is SW and WW there.
Hi, I've done SW on and off for years as a vegan and so did not eat Quorn. It works well for me - it's my head not the food that makes me unable to maintain. I can't comment on WW as I've never done it. It does seem though, that you can eat a lot more on SW.