Left: total infrared (TIR) luminosity plotted against the rest-frame power density at 1.4 GHz of all galaxies with reliable redshifts detected significantly in both the VLA and Herschel imaging. Galaxies which we have defined as hosting radio AGN are represented by open red diamonds and galaxies whose radio emission likely originates either solely from star-forming processes or some combination of star formation and AGN activity are shown as blue Xs. The dashed line denotes our formal best fit relation for SPIRE radio starbursts. The solid line is the best-fit relation from Del Moro et al. (2013) for “radio normal” galaxies. Right: histogram of q_TIR for the SPIRE radio AGN and SPIRE radio starburst samples. The two histograms are normalized to each other. Though there is significant overlap between the two samples, in large part due to SPIRE radio starbursts that likely host lower luminosity AGN, the two distributions are inconsistent with being drawn from the same parent sample.