  We present preliminary results of the analysis of optical spectra of two
complementary samples of Seyfert galaxies. The first sample was extracted from
a selection of the 4th Fermi Gamma-ray Large Area Telescope (4FGL) catalog, and
consists of 9 $\gamma$-ray emitting jetted Seyfert galaxies. The second one was
extracted from the Swift-BAT AGN Spectroscopic Survey (BASS), and is composed
of 38 hard-X ray selected Active Galactic Nuclei (AGN). These two samples are
complementary, with the former expected to have smaller viewing angles, while
the latter may include objects with larger viewing angles. We measured emission
line ratios to investigate whether the behavior of these Seyferts can be
explained in terms of obscuration, as suggested by the well-known Unified Model
(UM) of AGN, or if there are intrinsic differences due to the presence of jets,
outflows, or the evolution. We found no indications of intrinsic differences.
The UM remains the most plausible interpretation for these classes of objects
even if some results can be challenging for this model.
