1. no...all the ones like yours with the panel in the closet are the same and the coaches with the dc panel in the bay have the same switches. This also goes for the Oklahoma built coaches from about 1999 up.
2.yes
It's hard to pin down an exact date on the changes. I have seen 98 coaches with the dc panel in the bay and 99 coaches in the closet....all in the titling!!
I actually have a print showing each relay and the in/out put and triggers. It was one of the first prints and matches up pretty close all the way up to the new electrical system coach. Some of the loads have changed, but you can troubleshoot easily if ya know the inputs and outputs.