  We study the symmetries of the soliton spectrum of a pair of T-dual
integrable models, invariant under global $SL(2)_q\otimes U(1)$
transformations. They represent an integrable perturbation of the reduced
Gepner parafermions, based on certain gauged SL(3) - WZW model. Their
(semiclassical) topological soliton solutions, carrying isospin and belonging
to the root of unity representations of q-deformed $SU(2)_q$ - algebra are
obtained. We derive the semiclassical particle spectrum of these models, which
is further used to prove their T-duality properties.
