  The relative average minimum projected separations of star clusters in the
Legacy ExtraGalactic UV Survey (LEGUS) and in tidal dwarfs around the
interacting galaxy NGC 5291 are determined as a function of cluster mass to
look for cluster-cluster mass segregation. Class 2 and 3 LEGUS clusters, which
have a more irregular internal structure than the compact and symmetric class 1
clusters, are found to be mass segregated in low mass galaxies, which means
that the more massive clusters are systematically bunched together compared to
the lower mass clusters. This mass segregation is not present in high-mass
galaxies nor for class 1 clusters. We consider possible causes for this
segregation including differences in cluster formation and scattering in the
shallow gravitational potentials of low mass galaxies.
