Which one ferret or sugar glider and why!?!?!?!?

i miss my ferret cuz i lost him and i miss spending time with him. i want to be able to take care of a ferret agian but it wont be the same. i want a sugar glider cuz i want to try something different but i dont want to make a mistake by bying a sugar glider and wishing that i have never even bought it so which 1 and please give information about the sugar glider. :)