What are the differences between InMode FX FORMA and this one, and is it effective for a double chin?

I get really stressed out when taking selfies or showing my profile because of the double chin line and the fat under my chin.

 

I find thread lifting too daunting, so I am looking into InMode lifting, which destroys fat. I’ve read that there is a difference between the FX mode and the FORMA mode; is it generally more effective to receive both treatments together to refine the double chin line?

 

I saw reviews saying that a large, red, bloody bruise remains for several days and requires wearing a mask, so I'm worried about whether I'll be able to resume my daily life immediately. Also, regarding how often I usually need sessions to slim down my jawline, I would appreciate advice based on reviews from those who have actually had the procedure.