Probably the main difference between "new" and "old" is the addition of comparative passages in RC. The free June2007 is the beginning of such change. So anything PT's starting with Pt 52 (in addition to June2007) has the comparative reading.
Im studying today and taking a preptest this evening.
I was going to take tomorrow off completely, but I think I just might take a little bit of time to go through past LR questions, but I won't be doing much else.