THAT is very interesting. I never noticed Swede was on the occasional list, but yes the terms are interchangable - Rutabaga is also known as a Swedish Turnip, or Swede. The nutritional info is on the higher end of the allowable veggies but is in line with jicama (mexican turnip or yambean).
rutabaga (per 1 cup) - 50 calories, 11g carbs, 4g dietary fiber
jicama (per 1 cup) - 46 calories, 11g carbs, 6g dietary fiber
I would say use your judgement, if you have it more than a few times a week, keep an eye on what your body does - if you notice a drop in losses or if you feel bloated afterward, you may need to treat it as an occasional veg. I probably go through 2 rutabagas a week, I also eat jicama very regularly, and I haven't seen any change in my losses.