Thank you for your question in regards to these Juvéderm products. Juvéderm and Juvéderm Volbella are both hyaluronic acids, but they have different properties. For fading lips that also need volume, a combination of the two may be the most desirable. Juvéderm Ultra XC lasts up to 1 year, and so does Volbella with optimal treatment. Juvéderm Ultra XC gives more plumpness when you need to add volume to the body of the lip, and Volbella is perfect for the fine lines, to add some definition that has faded, and for more conservative filling. We often combine the two, with Volbella providing framework and fine line correction (we call it the "magic eraser") and XC for the actual meat of the lip to add plumpness, according to our client's preference. Lips are very subjective and we use several different products to create the specific look you would like to achieve. Both products are FDA approved to last 1 year with optimal treatment. To find out what is best for you, see two or more board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps.