I love both of them and have lost weight on both, I think slimming world is better if you have lots of time and like cooking but ww is better for those who like ready meals & pre-prepared food. I think sw is a bit harder and requires more effort but I did lose more on it.
Id say WW every time and would use the same reasons as HH did for SW lol
In the time Ive done WW Ive n ever ever felt hungry, and certainly not deprived of anything. Having tried SW for a while I felt I was eating the same things over and over and my portion control was terrible I found it much harder to incorporate into myevery day life.