What's the difference between Thermoflex and Ultrasonic Cannon?

Thermofacial and Ultrasonic Cannon both belong to the anti-aging class of instruments, Thermofacial uses the principle of radio frequency, selective heating of the dermis, stimulate the growth of collagen. And the focused Thermo Foam uses the principle of ultrasound? It can heat the subcutaneous SMAS fascia layer, dermis layer and deep dermis layer to stimulate collagen growth. Both are more effective anti-aging instruments,