  Interacting supernovae (SNe) IIn and Ibn show narrow emission lines and have
always been a mysterious and unsolved genre in SNe physics. We present a
comprehensive analysis of the temporal and spectroscopic behaviour of a group
of interacting SNe~IIn and Ibn. We choose SNe~2012ab, 2020cui, 2020rc and
2019uo as representative members of these SN sub-types to probe the nature of
explosion. Our study reveals that SNe~IIn are heterogeneous, bright depicting
multi-staged temporal evolution while SNe~Ibn are moreover homogeneous,
comparatively fainter than SNe~IIn and short lived, but limited in sample to
firmly constrain the homogeneity. The spectroscopic features display a great
diversity in H$\alpha$ and He profiles for both SNe~IIn and Ibn. The
representative SN~Ibn also show flash ionisation signatures of CIII and NIII.
Modelling of H$\alpha$ reveals that SNe~IIn have in general an asymmetric CSM
which interacts with SN ejecta resulting in diversity in H$\alpha$ profiles.
