I’ve owned and used bikes with RX’s and R1’s, and all sorts of Hope brakes, including mix & match tech caliper/lever combos. Personally, my recommendation would depend on your weight. I weigh 90kg in riding kit and the Formula’s are definately stronger stoppers for my weight, although the fine modulation, servicing and overal reliability, the Hopes are, IMO, a better long term bet – particularly if you’re around the 70kg-ish mark. I’ve had the alloy lever bolts on the Formulas snap twice – which isn’t so good 😯 , and the minimal pad clearance on the rotors can be a bit irritating.
FWIW, my wife is around 70-75kg in full riding kit and she managed an impressive emergency stop endo with the Hopes when she had to avoid some t**t in a sports car racing on the local lanes.