Neuspeed is easier to install, from what I hear. I have the Neuspeed, and did the install myself in like an hour and 15 mins. The Autotech is lightweight, and supposedly stronger, but not sure how the install is.
The neuspeed is slightly less expensive depending on where you buy it. I got my 28mm Neuspeed from
Greedspeed. It was on special for like $260 shipped. Right now, they are $272 with free shipping.