They fixed some issues made some worse. IMO they are all equal and you will love it after you do a few mods and have peace of mind. Do yourself a favor and ether barrow or get a CTS or scanguage so you can see your delta while your test diving it. also fill out your info so we know where your from and after you by it post up your truck info so when your asking questions we will know what your asking about. Welcome aboard!
NOTE: If you use a Edge CTS and the truck ever ran a bullydog it will throw the water in fuel light.