Complex ions multiple ${\left[{\mathrm{NiCl}}_6\right]}^{-4}\mathrm{and}{\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_6\right]}^{-4}$ are similar in their given properties

Oxidation state of Ni in each complex is +2. Both complexes have octahedral geometry. In each complex, Ni is present in Ni²⁺ and has two unpaired electrons. Therefore, both complexes have paramagnetic in nature.