What I posted on the R1 thread
I have RX on one bike and TH1 on another, both with 180/160 rotors.
For complete AM/DH tomfoolery I found the RX lacking just a bit even with 200/180 rotors, hence the purchase of TH1’s. I tried the TH1’s with 180/160 and it’s all I need on my big bike. Fabulous brakes and not much heavier than R1’s. Some riders report that TH1’s are grabby but I don’t find that… My Hope V2’s were grabby though!
For me on my hardtail the RX are spot on but for a bigger bike taking on big mountains I would go TH1.
I was still on original pads on both brakes until recently when the RX’s gave up – original RX pads can get a bit stinky when you press them hard but the TH1’s do not. Different pads I assume.
I love the one fingerness of the lever and the brilliant modulation of the Formula brakes. I’d love two pairs TH1’s but what I’ve got is perfectly fine 8)