Juvederm and Voluma are both Hyaluronic acid fillers, the difference between the two is based on how closely bound the hyaluronic acid molecules are in each product. Juvederm is a more loosely bound product, is softer and thinner, and this feature makes it great for treating undereyes, lips, and finer lines around the mouth/marionettes etc. Voluma a thicker product, has a better ability to lift and volumize, we use this for areas like the cheeks and temples, sometimes the nasolabial folds, it helps to elevate depressions because of these properties. Voluma would be too thick for undereyes, or delicate areas like the lips, it would result in a very firm and possibly unsmooth finished look.