I assume this is desired weight loss related even if just for the hols :-)
Soup can help produce a full feeling because the liquid can't just drain off as water can, but stays in the stomach for digestion.
Carbs tend to stay giving a full feeling too. I know many diets say to go easy on them, but I find not feeling an urge to eat is easily worth more than any small benefit avoiding them gives.
I suggest rather than eating more of one food type or less of another you try, if possible, to concentrate on portion control. Get used to smaller portions gradually and when you have lost weight you have a better chance of keeping to a senisble intake and keeping it off.