In the case of broad bands, it is common to use several Gaussian (or Lorentzian) functions to fit both Raman and infrared spectra. Here we use q-Gaussian and q-BWF functions. It is also suitable to repeat the observation made by to compare different fitting parameters of a Raman spectrum [and of other spectra], it is fundamental the knowledge of the used fitting procedures. Once we have decided the number of components and their line shapes, we can compare parameters obtained from a set of measurements. Moreover, there is no a priori reason to choose a particular function to fit the spectrum. For instance, Ferrari and Robertson suggested the BWF line shape for the G band in carbonaceous materials.