  In a recent preprint, ``A new universality class describes Vicsek's flocking
phase in physical dimensions'', Patrick Jentsch and Chiu Fan Lee have computed
the critical exponents of the Vicsek model in the ordered phase by means of
functional renormalization group methods. In this note, we compare their
results with our previous theoretical predictions for the Vicsek model, which
is expected to be exact in $d=2$ dimensions. We point out that the critical
exponents predicted by the two theories are extremely close in both $d=2$ and
$3$ dimensions. We found that both theories fit the current numerical data
equally well. Extensive numerical simulations for larger system sizes are thus
highly desirable to judge which theory is correct.
