I think most people on this board would tell you there is no "better" or "worse" diet. Some diets work better for some than others. It depends on the individual.
All diets are just different journeys with the same objective: eat fewer calories than your body burns every day.
For some people, taking the South Beach journey helps them stay on plan, for others its Atkins, for some it's just watching their carbs, for some it's calorie counting or Weight Watchers, etc. But ALL diets are just different sets of guidelines for reducing caloric intake.
There is a low carb board on this menu. Perhaps check out what other people have to say about SB, Atkins, and others. Then try out what you think works best for YOU.