  We discuss a holographic soft-wall model developed for the description of
mesons and baryons with adjustable quantum numbers n, J, L, S. This approach is
based on an action which describes hadrons with broken conformal invariance and
which incorporates confinement through the presence of a background dilaton
field. We show that in the case of the bound-state problem (hadronic mass
spectrum) two versions of the model with a positive and negative dilaton
profile are equivalent to each other by a special transformation of the bulk
field. We also comment on recent works which discuss the dilaton sign in the
context of soft-wall approaches.
