The key differences between the two sites/services is the focus. While we began helping all with schoolofbookkeeping.com, we realized this wasn't exactly what everyone wanted. As time passed, it became apparent that the Tax Pros, while we all swim in the same waters, have different needs and so we created schooloftaxes.com.
Content types on each may differ, and some may overlap. We have found that CPAs and EAS and other tax pros need more templates, diagrams and automation, so we are working on building in these tools as we grow.