Actually in the Q5 mode it goes even to higher compression rates. And it's 12Bit. ProRes is only 10 bit remember unless it's 4444.
A lot or peeps don't seem to realize pixel for pixel, BRAW is usually the same size or smaller than ProRes at a higher bit depth. Now that's it's supported on everything except FCP, I don't miss prores. I love ProRes, but I love BRAW more.