It is all the same resort with shared common elements, the differentiation is for RCI only. Silver Points is the newer section of the resort, in the high rise buildings. The older section are lower rise buildings with (usually) larger units. SLR has been on a renovation binge lately as they strive to keep gold crown status in RCI (Points is GC, SLR missed GC by about 2 points last year). Most of the units are in very good trim now.
As far as I know, wi-fi is not available. Internet is available in the business center, not sure if there is additional cost. I use a wireless stick, don't tend to use the resort facilities for this.
Disclosure: we are owners in the SLR section.