full-face mask choice: Mojo, Hans Rudolph or Quattro?

To avoid leaks, what’s the best full-face mask for a bipap user at 20cm pressure with severe sleep apnea?

I’m a pre-op stomach bypass surgery candidate. Am losing weight, so my facial contour is changing. That’s caused bad leaks in my Resmed Ultra Mirage full-face mask.

I’ve been told to consider the following full-face masks: Mojo (made by SleepNet – it has a gel mask cushion), Hans Rudolph V7600, & Resmed Quattro. Thanks in advance.