I can see where your coming from Paul, but you really have to see and experience this setup. Comparing dyno graphs with different setups these days may give you a rough indication on how similar/different they are, but out in the real world there are so many different variables. I'd definetly want that low end charge of this setup, the off boost on boost transition is what makes this car phenomenal, everything is all well when you punt a car in a straight line going flat out through the gears, but punt it around a twisty bit of road or race track and this will show how phenomenal this setup is.
Also bear in mind that if you open the bonnet of this car, you wouldn't see much out of the ordinary, quite standard looking. This is setup to be user friendly on the street, with the comfort and fuel economy of a large family sedan and over 700hp on tap.
Back to your question is it worth the 25k for that low end power, DEFINETLY, if you can afford it...
What setup are you talking Paul that will have more midrange and top end?? capacity/turbo/boost/fuel/inletmanifold/cams/ecu?? Are we talking similar specs to twoogle??