Similarities: •They both have cathode and anode charges. •Cathode facilitates oxidation and the anode facilitates reduction.
Differences: •Voltaic cells “work” autonomously, while electrolytic cells need an outside source of energy to work. •While the voltaic cells’ redox reaction is uncalled-for, the electrolytic cells happen at a set time.
I hope I helped! Chemistry is pretty hard to explain, so feel free to message me or leave a comment below if you need me to elaborate on my response. :)