With those Formuler boxes, you can delete the MAC and then in the server setup menu check the Credentials box and add your username/password.
Then connect.
I mention this because you can then easily switch between that connection and the m3u option, without needing to add or remove the MAC
Formuler and Dreamlink models are both capable of this option , while no other box is.
You can use a hardcopy of the m3u Playlist or the Playlist URL
You can also add an EPG URL
You can also use the Total Commander file manager to copy and paste the long URLs, instead of typing each URL.
Saves time and also ensures there are no typos made, and works great once you get use to it.
There is a Sticky thread on how to do that.
http://iptvtalk.net/showthread.php?42947-Copy-and-Paste-with-Total-Commander
And the difference between those two m3u lists is that the one with Options simply means that it includes things like channel descriptions and other media-data while the other does not have those options.