  We compare the mean-over-variance ratio of the net-kaon distribution
calculated within a state-of-the-art hadron resonance gas model to the latest
experimental data from the Beam Energy Scan at RHIC by the STAR collaboration.
Our analysis indicates that it is not possible to reproduce the experimental
results using the freeze-out parameters from the existing combined fit of
net-proton and net-electric charge mean-over-variance. The strange mesons need
about 10-15 MeV higher temperatures than the light hadrons at the highest
collision energies. In view of the recent lambda fluctuation measurements, we
predict the net-lambda variance-over-mean at the light and strange chemical
freeze-out parameters. We observe that the lambda fluctuations are sensitive to
the difference in the freeze-out temperatures established in this analysis. Our
results have implications for other phenomenological models in the field of
relativistic heavy-ion collisions.
