Usually I fanboi Formula… but while The One FR is a good brake it’s a bit clunky, a balls to bleed, and the lever is a bit of an odd shape, feels like it’s halfway between one and two fingers.
Whereas the latest The One is the best brake I’ve ever used, by miles, but the fitting hardware feels a little delicate- I’d have my doubts about trusting them on the dh bike. Popular race option but for everyday dh-bike stuff I’d kinda expect them to break and annoy me some day. Easy to fix but there goes your uplift day.
Old Oros have a pretty nasty lever, the later ones got a redesigned one which is backwards compatible but probably too expensive to swap.
So yeah, Shimano. Parts availability is a downer but offset by the value, and you’ll be buying new so fully warrantied. I wouldn’t look at anything else personally.