Wedi Board vs. Go Board

Hello.

I'm a newbie to mosaic. I'm struggling over Wedi Board. It's hard to get in my area and it's very expensive if I do. I keep gravitating toward Go Board as a substitute because I can easily get it and it's only $25 or so a sheet. Should I just buy a Wedi Board or can I go with Go Board? Has anyone worked with Go Board? If so, do you have any tips?

Thanks!