Safari can save all of a window's tabs to a bookmark folder, and it supports opening a whole folder as a new window.
There's no "sync", though; if you save the tabs to a folder, then open the folder as tabs, there's no link to update the folder again. Saving the new window as tabs will create another folder.
There's no "sync", though; if you save the tabs to a folder, then open the folder as tabs, there's no link to update the folder again. Saving the new window as tabs will create another folder.