network sharing

I am a very newbie Mac user here, and have tried a search, but, either am using the wrong search terms or something else is wrong with me. I have a home network setup with several different computers. This is the only Mac. (Please don't flame me! :) I am learning!!)) I can see all PC's...

I know the functional differences between virtual switch and network sharing in VPC 5, but is there a disadvantage to virtual switch that one should be aware of? It seems like virtual switch allows everything network sharing provides, and more, but I thought that sounds too good to be true...