Ya know what a prius with a guy driving sounds like as it goes by right?
probably just like a prius going by with anyone else driving it does... unless there is a mechanical issue that would cause an abnormal sound to further distinguish one prius from another. Alternatively the road surface and selection of tire could modify the sound of a prius driving.. however.. this would not be affected by the person driving unless there was descrepancy of weight between two drivers of at least 80%.