Top left panel. The NGC 315 SED. The red dots represent the simultaneous XMM-NewtonUVM2, UVW2, and X-ray luminosities. The blue dots represent the Chandra, obs. ID: 4156, soft and hard band luminosities. Notice the spectral and flux variability in the X-ray band (Paper I). Top right panel. The NGC 3226 SED. The red dots represent the simultaneous XMM-Newton UV and X-ray luminosities. Middle left panel. The NGC 3718 SED, which is one of the most complete SED of our sample with quasi-simultaneous HST-optical and XMM-Newton UV and X-ray fluxes (red dots). Middle right panel. The NGC 3998 SED with the red dots representing the simultaneous XMM-Newton UV and X-ray luminosities. Lower left panel. The NGC 4143 SED. The red dots represent the simultaneous XMM-Newton UV and X-ray fluxes. Note the high variability amplitude at UV wavelengths between the HST black-dot and the OM red-dots taken six years apart. This LINER 1 shows the highest UV flux relative to the X-ray in our sample. Lower right panel. The two NGC 4278 SEDs, representing the low state contemporary HST-optical and Chandra-X-ray fluxes (blue dots), and the high state simultaneous XMM-Newton UV and X-ray fluxes (red dots). See text for more details.