What is the difference between the John Deere F9 700 and F9 900?

Here is how the John Deere F9 700 and John Deere F9 900 compare on John Deere's published specifications:

• Horsepower: John Deere F9 700 809 hp vs John Deere F9 900 879 hp
• Weight: John Deere F9 700 40785 lb. vs John Deere F9 900 40785 lb.
• Fuel capacity: John Deere F9 700 396 gal. vs John Deere F9 900 396 gal.