AVS2 compared to Street Demon?

I haven't had any time with the new AVS yet. We sell them at work. Looks nice. What I have done is swap an Edelbrock 625 AFB for a 625 Street Demon. I found the SD on Ebay needing some small repairs and a kit cheap so I got it. So far, it's been a pretty big improvement over the Edelbrock.......not that the Edelbrock was a poor runner. Just the contrary. With the SD though, the idle is smoother, the mileage picked up, but where it really shines is the transition into the secondary barrel. It's very smooth yet very noticeable at the same time. It goes right into the secondary circuit smoothly, but you dang well know when that thing opens. It sounds good too. lol