So I was originally planning on getting a J&S with monitor and a RRPFR, but for a little more $ I could get a Link. So now I need to know whats the difference between this: http://www.carmodifications.com/Link_Poducts_files/products-index-link-plugin.htm and this: http://www.carmodifications.com/Link_Poducts_files/products-index-link-linkplus.htm