This is opinion only, but when it comes to turbo selection for say just a street truck, there are gobs of factors that come into play, if you change just a "turbo" expecting the turbo to fix the rest of things you find undesirable I find that many are VERY dissatisfied. You change one variable and the rest of equation changes.. I've never ran any of the above turbo's yet but have experience on Hot Stock Semis and let me tell you, there is trial and error sometimes, when I worked on "Touch of Class" we went through two Michigan Turbo $6k turbos and finally called CDS, they literally gave us a questionnaire, we provided the necessary info, and they worked with us, spent another 7k and tada.. People treat turbos like miracle parts, there's just too much to understand to throw money at the stuff..