  The recent discovery of a charge density (CDW) state in ScV$_6$Sn$_6$ at
$T_{\textrm{CDW}}$ = 91 K offers new opportunities to understand the origins of
electronic instabilities in topological kagome systems. By comparing to the
isostructural non-CDW compound LuV$_6$Sn$_6$, we unravel interesting electrical
transport properties in ScV$_6$Sn$_6$, above and below the charge ordering
temperature. We observed that by applying a magnetic field along the $a$ axis,
the temperature behavior of the longitudinal resistivity in ScV$_6$Sn$_6$
changes from metal-like to insulator-like above the CDW transition. We show
that in the charge ordered state ScV$_6$Sn$_6$ follows the Fermi liquid
behavior while above that, it transforms into a non-Fermi liquid phase in which
the resistivity varies sublinearly over a broad temperature range. The
sublinear resistivity, which scales by $T^{3/5}$ is a common feature among
other vanadium-containing kagome compounds exhibiting CDW states such as
KV$_3$Sb$_5$, RbV$_3$Sb$_5$, and CsV$_3$Sb$_5$. By contrast, the non-Fermi
liquid behavior does not occur in LuV$_6$Sn$_6$. We explain the $T^{3/5}$
universal scaling behavior from the Coulomb scattering between Dirac electrons
and Van Hove singularities; common features in the electronic structure of
kagome materials. Finally, we show anomalous Hall-like behavior in
ScV$_6$Sn$_6$ below $T_{\textrm{CDW}}$, which is absent in the Lu compound.
Comparing the transport properties of ScV$_6$Sn$_6$ and LuV$_6$Sn$_6$ is
valuable to highlight the impacts of the unusual CDW in the Sc compound.
