http://mywifiext.net is web address which gets resolved to land user on www.mywifiext.net webpage of NETGEAR, which is designed as an interface between user and NETGEAR device. By login into www.mywfiext.net user gets empowered to assign desired configuration for NETGEAR wireless range extender. Thus user have to be aware of basic utility of http://www.mywfiext.net setup page. So that unwanted hiccups while installing NETGEAR range extender can be ignored.
Now comes question that whether http mywifiext net setup and http://mywifiext.netsetup pertains to one and same thing or not. Answer for it is yes. If user enters http://mywifiext.net or http mywifext net setup, then result for same will be same. Thus user is free to enter any of them, while searching about http://www.mywifiext.net setup page.