What are the advantages of Radiesse over Ellanse if Ellanse gives longer-lasting result?

ellanse is not available in the United States. I suggest you see an expert to go over all the filler options.  Best, Dr. Emer.

Obviously, I cannot speak for any other physician. But, the simple answer to your question is that Radiesse is FDA-approved and Ellanse is still not. Both of them, as well as Sculptra (another FDA-approved agent), stimulate new native collagen production. None of these, however, can be easily or simply reversed, should an adverse or unwanted reaction occur. On the other hand, hyaluronic acid-based fillers have also been found to stimulate new native collagen and elastic fiber synthesis and these products can be reversed, should the need arise, via the use of the natural enzyme, hyaluronidase--which makes hyaluronic acid injectables my preference over all of the above. 

Both Ellanse and Radiesse are collagen biostimulators that can be used as a filler to sculpt and contour.

Ellanse contains PCL while Radiesse contains Calcium Hydroxyapatite

Radiesse can be hyperdiluted for skin rejuvenation and has been successfully used on the neck, hands, and body, as well as for acne scars. This is one advantage over Ellanse which cannot be hyperdiluted and hence is recommended for use only on the face

Having used both- I would say both products work well and it is also dependent on the expertise of the provider to achieve optimal results