What is the fuel capacity difference between the John Deere 6M 220 and 6R 220?

The John Deere 6M 220 has a fuel capacity of 85.9 gal. and the John Deere 6R 220 has a fuel capacity of 95.1 gal., a difference of 9.2 gal. The John Deere 6R 220 has the higher fuel capacity.