I really hate to say, I'm not familiar with either one, I don't know anything about them. I know the Walkera 83 has been around for quit a while but I never heard of the GH-83.

The biggest thing to watch for is parts availability, you what something that you won't have problems getting parts for. As a beginner your going to need lots of parts, and
you don't want to have to wait a month or two to get them.