  Electrically-neutral massive color-singlet and color-octet vector bosons,
which are often predicted in Beyond the Standard Model theories, have the
potential to be discovered as dijet resonances at the LHC. A color-singlet
resonance that has leptophobic couplings needs further investigation to be
distinguished from a color-octet one. In previous work, we introduced a method
for discriminating between the two kinds of resonances when their couplings are
flavor-universal, using measurements of the dijet resonance mass, total decay
width and production cross-section. Here, we describe an extension of that
method to cover a more general scenario, in which the vector resonances could
have flavor non-universal couplings; essentially, we incorporate measurements
of the heavy-flavor decays of the resonance into the method. We present our
analysis in a model-independent manner for a dijet resonance with mass 2.5-6.0
TeV at the LHC with $\sqrt{s}=14$ TeV and integrated luminosities 30, 100, 300
and 1000 ${\rm fb}^{-1}$, and show that the measurements of the heavy-flavor
decays should allow conclusive identification of the vector boson. Note that
our method is generally applicable even for a Z' boson with non-Standard
invisible decays. We include an appendix of results for various resonance
couplings and masses to illustrate how well each observable must be measured to
distinguish colorons from Z' bosons.
