Comparative analysis of transesterification of virgin cooking oil (VCO) and waste cooking oil (WCO) in catalyzed and supercritical transesterification technique utilizing methanol and ethanol as solvents has been executed in this study. The graspable part of this research was to address the analogy of catalytic and supercritical process using ester content acquired from virgin cooking oil and waste cooking oil transesterification. Oil to alcohol molar ratio of 1:6, reaction temperature of 65 °C and 1 bar pressure were contemplated for the catalytic process, whereas 260 °C and high pressure (65 and 75 bar for methanol and ethanol, respectively) were accounted for the supercritical process. Distinct layer partition was ascertained for both processes. Ester, fatty acid and glycerol composition was investigated for both the upper and lower layers independently, from which 100% ester composition in the upper layer and a mixture of ester and other composition in the lower layer was procured for the catalytic process owing to succeeding filtration and washing. Nonetheless, mixture of ester (>75%) and other composition was attained in both layers for the supercritical process where purification process was not administered. The analogy in the result obtained testifies the dominance of waste cooking oil compared to virgin cooking oil, taking cost into consideration.