  In this report, we compare the naturalness and Dark Matter (DM) properties of
the Minimal Supersymmetric Standard Model (MSSM) and the $B-L$ Supersymmetric
Standard Model (BLSSM), with universality in both cases. We do this by adopting
standard measures for the quantitative analysis of the Fine-Tuning (FT), at
both low (i.e. supersymmetric (SUSY)) and high (i.e. unification) scales. We
will see a similar level of FT for both models in these scenarios, with a
slightly better FT for the BLSSM at SUSY scales and MSSM at Grand Unification
Theory (GUT) scales. When including DM relic constraints, we drastically
confine the MSSM's parameter space, whereas we still find a large parameter
space available for the non-minimal scenario.

High Energy Physics - Phenomenology