All the Fundamentals courses cover the basic curriculum of beginner guitar skills & ideas. There are small differences in the order of material or how each instructor paces or presents any given skill or idea. And of course a student might have a more favorable reaction to the personality of one particular instructor.
That's one reason GT has Fundamentals course by 3 different instructors. Another reason is to update the production standards to keep up with technology (better cameras, lights, video & audio). Mine was done 15 years ago. Lisa's was about 9 years ago. Anders is the most recent, done close to 5 years ago.
I only play electric in mine. Lisa plays both acoustic & electric in hers. Anders only plays acoustic in his. Hope that helps!
I am sticking with your Fundamentals Courses. I am currently in Chapter 5 of Fundamentals 1. I like the way you present the material. I'm not worried about how advanced the production value looks. The information is what I'm most concerned with. Your knowledge and talent Chris is impressive to say the least.