What is the best practice to load next map after gamemode ends?

Hey! What is a better approach? Having 2 Levels and server travel between them when the game round end, or to have just one Wrapper level with all your maps and then unload and load them and restart the gamemode?

like this:
Wrapper (empty, contains the loadingscreen)
-> Sublevel1
-> Sublevel2
-> Sublevel3