he reminds me of my boy! He is a chi/yorkie mix! But mine has a 1/2 sister that is full yorkie- and they look a lot alike, too! so it is hard to tell- ask the breeder to give you a limited registration! He is probably full, you saw 2 yories! A lot keep hair shorter for easier care!
Of courde I think he is a doll!
here's mine;s pic- he's kind of chunky!