Sanderson DD7 Headers or TTI "step"

I was going with the TTI's. I actually bought a pair from HP Engines, (a fantastic engine builder both in personality and intelligence in Albemarle, NC. they won 3rd place in MOPAR Muscle engine builders national contest), but the headers were the 1.875 Dia. pipes into a 3.500 collector, (full race headers). I did not fully explain myself to him, and since I am not going racing, these would actually hurt by low end torque. They were gracious enough to take them back with no questions. In seaching for data I learned that I needed the "step" headers also I came across the Sanderson DD7's, I really like the looks of these but I will go with what others experience dictates. either the TTI's "step" or the Sanderson DD7's. To mrdodge69 and to others ... Thank You for your input.