I am looking for a fast sport quad. What is the power difference between these 3. Thanks

 

Stock overall Hp they are all close. The 660 and 700 have more torque and a smoother power delivery. A 450 will be higher strung, but they also have a lower center of gravity and better handling. If you are considering a 700 or 450, drop the 660 off the list as the 700 is improved in all ways.

 

I agree With scooter When looking at the same machines I chose the 450 Honda because of the low center of gravity it doesn't feel like it's going to tip as easily. as a 700. And in a race it would be close because on a straight away he could have a little more but on a corner a 450 would pull away.