Hum. Interesting question. Thinking back, I don't believe that any entire ruleset, or even any major hunk of a ruleset, moved into 3.1 that wasn't already in 3.0. There has been some rule migration, but it has largely been piecemeal.
We will probably have to run an overlap check with the 3.1 rules and do something like make a 3.1scores.cf or some such to zero out any rules that overlap too much. Loren