RTO is everything the plane can do.
Max manual is everything the plane can do.
Max Autobrakes, a landing a/b setting, is less then max manual OR RTO.
Data I have for a 140,000 lb a/c shows a landing roll reduction of 204 meters when using max manual braking vs. max autobrakes.
Even if it's a respected Captain, TRI, TRE, ask them to show you the data. The data I checked for 120,000 lbs, 130,000 lbs, and 140,000 lbs showed 204-207 meters.
