I have had them both and I think what dictates which to go with is rider weight and wave size. For your size, I would recommend the Sweet Spot. Hovever, for riders over 220#'s (or approaching it), I would go with the Swallow.
I prefer the Sweet Spot with just the Big Boy fins on the outside and I prefer the Swallow with the 3 degree canted fins. I also prefer the Swallow overall, but I am a bigger rider.