It definitely depends on the size of the turbo. A bigger turbo will have greater turbo threshold and thus less low end power. In general, the turbocharged cars will still produce more torque per horsepower, so the 300hp turbo guys are typically producing much more torque. Partially this is because they aren't dealing with parasitic losses, so more torque gets put to the ground, and the other part is because the torque drops off and doesn't build to redline like a JRSC, for instance. Looking at this FA20F from a WRX, we see what a typical turbo application from the factory looks like. I would agree that more curves are shifted more to the higher rpm range:
The other factor is lugging the engine. This is never good, but with a supercharger, the rpms will just sit down low and provide whatever constant boost is at that rpm, so if someone was going 45 mph up a steep hill in 6th gear at 2.5k or whatever, the supercharger wouldn't be making much torque, so bad but not terrible. The turbo is more load dependent, which is why brake boosting is more effective than just revving the engine, so the turbo will typically build more boost/torque in the above scenario. Could be bad.