The big difference between the Dirt Devil hand vac and the Royal Prince 501, of which I have three, is the body of the Royal is made of metal, instead of plastic. The design was intended to complement that of the metal Royal uprights. I almost bought a Dirt Devil hand vac at a thrift store a while back, just to have a spare brush roll for my Royals. I probably should have, seeing as it was only $4 or $5.