Connecting to The Different Earth is easy - if you don't want to rely on the ARK's search feature, you can add the Different Earth servers to your Steam Favorites directly.
Steam Favorites & The Different Earth
I. Open Steam, click "View," then "Servers."
II. Click the "Favorites" tab.
III. Click "Add A Server."
IV. Add "game.differentzebras.net" & click "Find Games At This Address.'
V. Select desired Maps, click "Add Selected Game Server To Favorites."