Ulthera or Thermage - or something different? And before or after weight loss? (photos)

I will turn 36 this year and slowly but surely I am seeing sagging in my nasolabial and mouth corner areas. I am thinking of doing Ulthera or Thermage - or even both? But I am not sure yet whether these procedures are the right one in general. Secondly, I want to get rid of my pandemic weight gain this year (~15kg/~33lbs) and am wondering whether this weight loss will affect the result of the procedure. Would it be better to have it before or after the weight loss, or does it matter at all?