The one on motoslave is a documentation, which is technically different from a guide.
A documentation for a program will be technical, telling as is what code does, using technical terms to each element. It may include warnings for users (like don't ever use this, this is in the code because otherwise it won't work, but don't use it!).
On the other hand, a guide will explain things in plainer terms (potentially being not technically correct for the sake of understanding), often have more examples (plain or interactive).
When you get the hangs of the basic terms, the documentation is the place to go to look up stuff 
If you are looking for other resources for Twine: