I have both bikes and the difference is night and day. Don't get me wrong, the foreman is a good bike, very dependable. In fact it's a an 03 model and still going strong. And with the ITP mudlites, I use to think it was a beast. Now the 550 is a total different bike. Even with the factory tires. The ground clearance and power of this bike is outstanding. Not to mention the IRS. And ride quality is well, you guys already know. Took a nice 25 mile journey today. What a blast.