It requires MUCH LESS PREP; and my kids loved it. It was fine, but I'm ok with seat of the pants coming up with stuff, especially in a D&D type fantasy world. If your jam is to spend a lot of time designing things in advance and having everything prepared; would be tougher.
For better or worse, I do like having maps and such prepared, which wouldn't be so bad in person, but on Roll20 it requires some thought. At some point I'm going to run it with no prep or framework once I'm done with Cinder Queen, just to see how it goes.