Yes, I can confirm that you are confused. Here is some evidence:
- The subject (I), "The difference between online learning and classroom based..."
is in flesh and skin. You talk like that the classroom is teaching. No, there is a human in it!
> The subject (I), "... computer generated material"
Same problem. The computer doesn't generate anything. There is a human giving it instructions.
> I have been teaching, and using computer generated materials in the classroom for many years.
Really, can you be more specific about those "computer generated materials"? Don't you mean, you have created electronic documents using some sort of an "Office" package?
> Since looking at the Moodle sites of various colleges I have seen a lot of tutors putting exactly the same online as they used in the classroom. Is this common practice?
As others have pointed out, if those courses are conducted face-to-face, what is wrong about making the electronic teaching material available to students?
> Surely a powerpoint, for example,
What the point in PowerPoint? (Search the web for "pointless powerpoint").
Or do you mean "presentation slides"?
> that has me in front of it talking about it, eliciting discussion about it, verbally picking out specific parts of it, should be a largely different design to a powerpoint that is meant to be accessed by a student with no tutor input?
Depends on the teacher. If the teacher expects the students to understand the subject during the presentation, the slides are just reference. If you want to convey slides and the lecture, you must make a video.
> How much can the tutors be asked to produce/edit material so that the students are progressing online efficiently?
I would have said, you are not only a newcomer to Moodle but to the whole field of blended learning, not to mention pure on-line learning. But you've been in the moodle.org for eight years, how come? More surprisingly, this is your only forum post in all those eight years(?).
Well, if you have been trolling, I bit it!