Just a few tweaks separate Version 8 from Version 9 such as an increased blitz effect on draw plays and a strengthening of the blitz effect on passes. The screens and interface are the same.
I think Version 10 comes out this summer. The program is totally redone and the screens are going to be unrecognizable from any previous edition.
With Second and Ten a quick free download gets you all NFL teams and seasons dating back to 1932.