Well of course, there really isn’t any comparison between the two. But as long as you know what the vafc can do for the application and set it up appropriately, it works well, my car runs like stock with its assistance and I’m Supercharged with meth injection. But I also understand that it wouldn’t be effective to use one with a turbo set up. Seems like allot of the time the user doesn’t know its strengths and weaknesses well enough to have the right expectations first off, and then 2nd, program it right. Its just an open loop fuel controller that cant add fuel basically lol, very limited but it works well at performing the operation without corks. Some of the other features have corks to consider depending on the car/model.