This study illustrates a comparative analysis of the spreading behavior of droplets with varied viscosity index impacting a superhydrophobic surface. The specified phenomenon of drop impact is numerically modeled using the finite volume method (FVM) along with volume of fluid (VOF) method for interface capturing. The bottom surface of the control volume is given the dynamic contact angle boundary condition to obtain the desired surface wettability. The transport property of the impacting droplet is defined using the power-law rheology model in which the viscosity index n is varied in the range (0.6 ≤ n ≤ 1.4). The spreading behavior of droplets differing in their viscous behavior has been evaluated by comparing the time evolution of spread factor (β) and the maximum spread factor max at different Weber numbers. The observation reveals that at identical Weber number power-law droplets exhibits diversified spreading behaviors owing to their difference in transport behaviors due to change in their viscosity index. This observation is further justified using the morphological comparison of droplets at different time steps. Also, with increasing Weber number, the maximum spread factor βmax increases and particularly droplet with shear thinning behavior (n < 1) showcased elevated spreading in comparison with its Newtonian counterpart and the droplet with shear thickening behavior (n > 1).