Both can be used to make savory or sweet dipping sauces for fruits and veggies. Both can be used in smoothies. Use sour cream to make cheesecake, and then mix more sour cream with powdered sugar to make a wonderful topping for that cheesecake. Sour creme can be used to make pancakes, cakes, in quickbreads, to make icing, to mix with macerated berries and whipped cream and layered with pudding to make parfait. Sour cream can be mixed with oregano, basil, salt, and pepper to make ranch dressing. It can be mixed with nuts, raisins, and grated carrots, pineapple, and sugar to make a salad.
combine either with cumin, cilantro, and chili powder to make a taco topper, or make into a seven layer dip. Add to creamy sauces, gravies, and soup to add a bit of extra flavor, but not too much.
A couple of ideas for you. Hope they help.
Seeeeeya; Goodweed of the North