  Based on a proposal to observe 18 bright radio sources from the SMS4 catalog
with the Neil Gehrels Swift Observatory (hereafter Swift), we obtained X-ray
observations of 17 targets (one target was not observed). Following up our
first paper that discussed 31 sources (see Maselli et al. 2022; 20 sources
detected as point sources and one very extended source), we present results for
this final sample of 17 radio sources, that previously lacked dedicated,
pointed narrow FOV X-ray observations. One of these 17 sources, undetected by
Swift due to a very short exposure, was instead detected by eROSITA, and given
in the Data Release 1 (DR1) Catalog. No 1eRASS source was found in the DR1 for
the remaining source, unobserved by Swift. The new Swift observations led to
eleven X-ray source detections in the 0.3-10 keV band and six upper limits. We
investigated the extent of the X-ray emission, the hardness ratio, and when
statistics allowed we carried out a spectral analysis. The X-ray emission of
eight sources is consistent with point-like emission, while three sources show
clear evidence of extent, each with peculiar properties. We used the X-ray
determined positions and uncertainties of the twelve detected sources to
establish associations with infrared and optical sources from the AllWISE and
the GSC 2.4.2 catalogs. Requiring a detection in both the infrared and the
optical bands to establish a candidate counterpart for our X-ray detections, we
identify counterparts for all twelve sources. We discuss the interesting
structure of MRC B0344-345 and PKS B2148-555, two of the six extended X-ray
sources that we detected in both our Swift campaigns, and suggest they are very
promising for further X-ray and radio investigations. For the 38 SMS4 sources
that lack pointed, narrow FOV X-ray telescope observations, after our Swift
campaigns, we list 18 likely counterparts from the eROSITA DR1 catalog.
