ETTV:Extratorrent.Com and EZTV:eztv.ch are totally two different Torrents Provider sites.
However, most of you may got confused by their similarity in name. And some of you may be confused by same torrent request protocols in both the sites.
But, the fact is that they both aren't run by one. Those two are different from one another.
But,sometimes they help out their users for finding better results, they share their torrents mutually. It's just a part of User Support.