  Anomalous Viscous Fluid Dynamics (AVFD) model calculations for
$\mathrm{^{96}_{44}Ru +\, ^{96}_{44}Ru}$ and $\mathrm{^{96}_{40}Zr +\,
^{96}_{40}Zr}$ collisions ($\sqrt{s_{\rm NN}} = 200$ GeV) are used in concert
with a charge-sensitive correlator, to test its ability to detect and
characterize the charge separation difference expected from the Chiral Magnetic
Effect (CME) in these isobaric collisions. The tests indicate a larger charge
separation for $\mathrm{^{96}_{44}Ru +\, ^{96}_{44}Ru}$ than for
$\mathrm{^{96}_{40}Zr +\, ^{96}_{40}Zr}$ collisions, and a discernible
CME-driven difference of $\sim 10$\% in the presence of realistic non-CME
backgrounds. They also indicate a strategy for evaluating the relative
influence of the background correlations, present for each isobar. These
results suggest that charge separation measurements for these isobaric species
could serve to further constrain unambiguous identification and
characterization of the CME in upcoming measurements at RHIC.
