First off you're a beautiful 52year old! You've obviously taken care of yourself and your skin and for that- you're already way ahead of the curve so congratulations on that!
As far as which product to use, I would recommend using whatever facial plastic surgeon you trust uses. Results are great and similar with either. We all have different relationships with he products and the product companies quite frankly and that it's like Pepsi or Coke- some people swear for one and against the other... They are different products yes.. But they accomplish the same task.
I routinely use Radiesse. The reasons why is that it comes in a 1.5cc syringe so my patients are getting more volume which they like (voluma comes in 1.0cc syringe). I also can add different amounts of lidocaine to my Radiesse depending on how thick I want it. Radiesse also stimulates collagen formation and lasts longer.
Hope this helps!