Which procedure is more suitable for me, Ulthera or Thermage?

Lately, whenever I look in the mirror, I feel like the elasticity of my jawline isn't what it used to be and my pores seem slightly enlarged, so I am seriously looking into anti-aging lifting treatments.
I have heard the names Ulthera and Thermage, two very famous procedures, but I am confused about exactly what the fundamental differences are and which one is right for my skin.

My skin is not yet at the stage of severe aging or sagging, but I want to smooth the overall texture and boost its elasticity.
I would appreciate a clear expert guide on whether I should receive Ulthera (ultrasound) or replenish collagen with Thermage (radio frequency) at this stage.
It would be very helpful if you could advise on whether there is a way to combine the benefits of both procedures and receive them simultaneously, as well as the recommended number of shots and duration of results for preventive purposes.