Radiomaster Zorro or Radiomaster TX16S MKII ?

I want to get into long range thermal soaring using a 2.5m wingspan ASW28 powered glider. While DJI O4 Air Unit + Goggles V3 have a satisfying range - I do not know which which remote to buy for this application. Oh, as well as which receiver for either of these transmitters will do best for my long range flight. 10km would be sufficient, but the more the better of course.

Please help with your advice!