In this communication, we address whether or not there is an equivalence between the kinematical and dynamical descriptions of the spatially flat $\mathrm{\Lambda }\mathrm{CDM}$ model. We address this by investigating whether an almost $\mathrm{\Lambda }\mathrm{CDM}$ expansion history [$j(z)\approx 1$] corresponds to an almost $\mathrm{\Lambda }\mathrm{CDM}$ model [$w_{\mathrm{DE}}(z)\approx -1$] by considering two particular explicit examples. At least for the cases considered, this turns out not to be the case. Instead, what we find is that an almost $\mathrm{\Lambda }\mathrm{CDM}$ cosmic evolution rather corresponds to an almost unified dark-fluid model. Considering that one never gets the exact condition $j(z)=1$ from any cosmographic datasets, this raises further questions on whether the $\mathrm{\Lambda }\mathrm{CDM}$ model is the best candidate for the standard model of the evolution of the Universe.

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• Cosmology
• Dark energy
• Relativistic aspects of cosmology
• Large scale structure of the Universe