What is the difference between the John Deere F8 400 and F8 500?

Here is how the John Deere F8 400 and John Deere F8 500 compare on John Deere's published specifications:

• Horsepower: John Deere F8 400 537 hp vs John Deere F8 500 577 hp
• Weight: John Deere F8 400 36375 lb. vs John Deere F8 500 36375 lb.
• Fuel capacity: John Deere F8 400 290 gal. vs John Deere F8 500 290 gal.