How does the charged-lepton's mass affect the quasielastic neutrino cross sections?
Martini et al. [Phys. Rev. C 94, 015501 (2016)] have recently observed that when the produced-lepton's mass plays an important role, the charged-current quasielastic cross section for muon neutrinos can be higher than that for electron neutrinos. Here we argue that this effect appears solely in the theoretical descriptions of nuclear effects in which nucleon knockout requires the energy and momentum transfers to lie in a narrow range of the kinematically allowed values.