The new Maytag is based upon the F3600, just below the top of the line Simplicity model. This machine has a unique motor and fan, as well as fan case. The only thing that's the same as the Simplicity is the brush bar. Everything is different, even the soleplate. The bag door opens complete, and the disposable HEPA bag has a self closing plastic collar (think Miele). It's about half as loud as the Simplicity. That being said, the Simplicity/Riccar line is being revamped to take the new Maytag motor, fan, fan case, bag assembly, and soleplate. Plus two additional features not found on the Maytag. Simplicity/Riccar dealers will have a virtually identical product to sell, with two more features, in GORGEOUS new colors, at the same price as a Maytag. It's a win/win for the independent dealer. Maytag advertising dollars drives customers in a vac shop, where they are 'upsold' a Riccar/Simplicity - but for the same price they were already willing to spend upon the Maytag.