Street Demon vs AVS2

I am thinking about my next build which will be an economy/performance 383 hopefully for a first generation Charger. The cam will likely be in the 210-220 range with low end torque more important than high end horsepower. I want a comfortable cruiser, that will get decent mileage cruising, with say a 2.94 gear, or possibly an overdrive. I like the looks of the 625 Street Demon with the composite body. It has small 1 3/8 primaries and the single large secondary blade. I have read good reviews on them. lately I have also been reading a lot of good things about the new 650 AVS2 with annular discharge boosters (the SD has conventional boosters). It also has slightly smaller primaries than secondaries. Any thoughts or real world experience with either?