What is the PTO horsepower difference between the John Deere 6M 220 and 6R 220?

The John Deere 6M 220 has a PTO horsepower of 177 hp and the John Deere 6R 220 has a PTO horsepower of 176 hp, a difference of 1 hp. The John Deere 6M 220 has the higher PTO horsepower.