Nothing.  There is no difference.  A Maintenance Inspection is as thorough and complete as a Buyer or Pre-Listing Inspection.  The benefit is that the Home Owner has a vested interest to make things as open and accessible as possible so the Inspection can provide the best possible picture of current conditions.  We will have a discussion before the inspection and give you a guideline of what areas to make most accessible and you can book your inspection at your schedule depending on how much time you need.  A Maintenance Inspection can help a Home Owner prioritize repairs, create planning budgets, identify safety issues.  Maintenance extends the life of components in the home.