For me, Atkins is easier, mostly because I would rather cut my carbs to almost nothing than have their carb-categories... actually what I use is an Atkins variant called "the Protein Power Plan", which I think has a less strict induction phase.
Plus, South Beach Diet doesn't like the 'low-carb' chocolates and ice creams, so I understand.
It allows sugar-free treats...but since it isn't a low-carb diet in the strictest sense of the word...maybe that's why they don't really encourage the low-carb foods? Basically my book says if you're going to treat yourself, have the real thing, but only once in awhile. On the other hand, things like sugar-free fudgesicles are listed as a good snack.