One of the better videos I have seen in a long time showing comparisons of several different types of superchargers vs. turbos on the same engine, showing the power curves at the same peak boost levels with the same air/fuel ratio and peak timing.
Although it was not a completely perfect test, as there are some minor details that could change the power outputs for each setup, this video does do a good job of comparing them and was a ton of work for him to do, hope you enjoy!