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He's answered his own question though, the ZR1 is a lot cheaper than a ferarri or other super-high end vehicle that it can "out perform", although when we are thinking about this, are we talking about in "every catagory" or just 1/4 mile or something? More expensive cars may end up more well-rounded, more luxurious, etc. That doesn't mean the ZR1 is a bad car of course. Some of the other sacrifices you make for the "cheaper" SC system deal with fuel consumption, engine longevity/pressure, most likely weight, heat dissapation, etc. The SC may suffer more from heat soak when pushed hard on a track, whereas airflow with a turbo system may keep it cooler (and require more engineering to do so). SC systems are generaly simpler and more cost effective for the manufacturer I think, and they don't really care that it might mean more money spent for gas, more internal engine pressure, heatsoak, etc. Just look at a turbo system, the tubing bends and so on, and then a comparable SC system.
The manufacturers are interested in turning a profit, and they are NOT putting out a bad product if they are making a SC car, but if you want something better or more "rounded" in terms of performance, most higher end cars have turbos. I think when "money becomes no object" (or at least not the primary) the "can achieve more with less boost" aspect of turbos makes them the primary choice.
As far as power or torque under the curve, go back to what I was saying about the turbo size and tune, generalities are poor in this case and compressed air and fuel creates a LOT of torque.
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