Ginseng ficus (Ficus retusa), is simply one of the many hundreds of species of Ficus and is used extensively for bonsai because it is hard to kill. Asking to have the differences between privet and Ficus B described is like asking someone to describe the differences between a boy and a turtle. The differences are too many for someone to enumerate. Much information is available on the net if you want to chase it down. I'm guessing you won't need to go any further than 'Google Images'.

Al