CJadamec I don't think much is different. Even inverter generators start out with AC. So its AC -> DC -> AC. So as the engine slows and the voltage starts to decrease, current will start to increase. One possible advantage to a microprocessor controlled inverter is it could recognize when the engine has lost power and electronically cut off the inverter.
Here is a good explanation:
First, the generator's alternator produces high voltage multiphase AC power. The AC power is then converted to DC. Finally the DC power is converted back to AC by the inverter. The inverter also smoothes and cleans the power to make it high quality. A special microprocessor controls the entire process, as well as the speed of the engine.