Can’t tell you about 180mm, but the 200mm certainly fouls the shimano brake mount on my M10 with XT 4 pots. I’m switching the lot to Hope mounts and E4/Tech4 brakes anyhow so doesn’t bother me.
We have 2 M10’s in the house and both headsets have died after a 5 or 6 rides in winter. The stock bearings are junk and have now been replaced with Hope stainless headsets instead.