Comparing the Street Master to the Street Dominator is like comparing an F18 to a Piper Cub. Which one is better? Depends on what you are doing with it.

Yeah they are both airplanes but their design criteria is miles apart. The SM is designed for low rpm high torque and fuel economy. The SM is for the exact opposite. Which one is better? See above.

If you already have a stock intake, run it. The SM or the Performer will not improve upon it other than in weight. If you need to buy an intake go with the Performer unless you get a good price on a stock intake. Pass on the SM unless it is free.