Histograms of the concentration parameter from King model fits for (top panel) old M31 clusters (young clusters shown by asterisks, the young cluster in NGC 205 by a five-pointed star), (middle panel) MW open clusters and (bottom panel) MW globular clusters. It can be seen that the M31 old clusters resemble the MW globulars in their concentration, while the M31 young clusters cover the range of both open and globular clusters.