I don't think you get more RealTracks. It appears to depend on you having them separately. HTH
From the page here -
http://www.pgmusic.com/xtrastyles.php?os=win


"The Xtra Styles use RealTracks from the Band-in-a-Box® 2016 and higher UltraPlusPAK, EverythingPAK, or Audiophile Edition, and require Build 437 or higher. "

The link appears to be the 2017 version, but the date referenced may be outdated.
Anyway, instead of boasting about additional RTs it seems to say you need to already have them.
That said, I know some people really like them.

Last edited by rharv; 01/15/17 10:08 AM.
I do not work here, but the benefits are still awesome
Make your sound your own!