First, we find a rather good correlation for the coupling constants, both in the isolated and in the solvated polypeptides. Thus, it appears that these are well described by the existing maps, which are able to predict the distinct coupling patterns of different secondary structure elements. Second, we also find a good correlation for the local-mode frequencies in isolated polypeptides. In this case, the vibrational frequency maps are dominated by the nearest-neighbor shifts, for which all considered maps use the same model.