Recently, de Roany and Pacheco (Gen Relativ Gravit, doi:10.1007/ s10714-010-1069-2) performed a Newtonian analysis on the evolution of perturbations for a class of relativistic cosmological models with Creation of Cold Dark Matter (CCDM) proposed by the present authors (Lima et al. in JCAP 1011:027, 2010. In this note we demonstrate that the basic equations adopted in their work do not recover the specific (unperturbed) CCDM model. Unlike to what happens in the original CCDM cosmology, their basic conclusions refer to a decelerating cosmological model in which there is no transition from a decelerating to an accelerating regime as required by SNe type Ia and complementary observations. An alternative cosmological approach providing a transition from an early decelerating to a late time accelerating expanding Universe (as indicated by SN Ia data [3]) and a reduction of the so-called cosmic dark sector has been recently discussed in the literature [2,4,5]. The basic idea is a simple one. The gravitationally-induced particle creation can lead to an accelerating cold dark matter (CDM) dominated Universe without requiring the presence of quintessence scalar fields or a cosmological constant. This happens because the irreversible creation of cold dark matter (CCDM) can