Comparison of our color profiles (red dots) with the ones derived from McDonald et al. (2011; black dots) for six galaxies matching the two samples of different types. From top left to right we plot VCC 1632, VCC 2095, VCC 596, that are respectively an E,S0,Sc (from NED). In the second row we plot VCC 1555, VCC 1356, 1499, respectively an Sc an Sm and a dE. There is an overall good agreement but the profiles display some differences especially in late type galaxies. We ascribe these effects to the difference in the isophotal fitting technique and the one adopted in this work to extract the profiles. McDonald et al. (2011) are indeed sensitive to twists of the isophotes occurring in the presence of spiral arms, bars and even in bright HII regions in irregular galaxies.