Nah the Republic was reorganized into the Empire which means that the Republic won it.
Yeah but here the thing: Did they reallly win? Lets look at the facts
first I will aknowledge the fact that the Seperatists were defeated but they were created and manipulated by the Sith? Doesn't that make them not a real enemy if they were just a fascade, a tool to inconspicously gain the Sith power? Also the Sith took over the republic the ultimate goal of Sith in the past. AND the Republic died, it literally died and all its leaders were replaced changing it forever.