What is the fuel capacity difference between the John Deere 6M 230 and 6R 230?

The John Deere 6M 230 has a fuel capacity of 108.3 gal. and the John Deere 6R 230 has a fuel capacity of 107 gal., a difference of 1.3 gal. The John Deere 6M 230 has the higher fuel capacity.