Vegetable broth vs. chicken noodle soup for colds?

Chicken soup has been shown in the laboratory to contain substances (derived from the chicken) that are effective in combatting the symptoms of a cold. I don't have time to find all the sources, but I've included a link below. In there they do say that vegetable soup is somewhat effective. Nonetheless, all soups fall under the category of "comfort foods", and will make you feel better, no matter what the ingredients.