I'm going to start a new business so i need few computers. Now i'm confused in Xeon and Core processors. Someone can justify what is difference between Xeon and Core processor type?
Well, do not base the selection on price - base it on what you need to get the job done.
There are many Core and Xeon processors available. Without more detail, the biggest difference is $$$$.
For example, a POS or office machine need not ever be a Xeon, However, you may want to consider a Xeon for a workstation or a server, again depending on needs.
I suggest you consider what you need. You can find the selling points here: