I bought the freedom z because I liked the mower, I liked the dealer, and they were located close to me. I was comparing the raptor sd when I purchased mine. The fastrak will get you the same engine but gives you a better transaxle with the zt3100. I do wish the freedom z came with the flat free casters like the fastrak, as well as the larger drive tires. I think either way you go your going to get a well built mower. Not to confuse you any more but one mower I wish I knew more about when I purchased mine is the ferris is600/700. For very similar money you can get a Kawasaki fs engine, zt3400 transaxles, a striping kit and a suspension. If you have a dealer close, it may be worth looking at. Good luck with your decision, you're gonna be happy either way you go.