Nope. The readme doesn't do any kind of comparison with the previous versions. It's comparable to the readme that came with the first Poser Pro listing the features it has and what they do.

Now, my first gripe. After 5+ hours the content zip craped out in the downloading process at 1.7 of 1.9 gigs and has to be restarted. I'll try restarting it when I go to bed shortly and hope for the best. The legacy content finished it's 1.3 gigs completely. My suggestion if it doesn't complete before I wake up is to break that large zip into two smaller zips if anyone from SM reads this before I wake up tomorrow.