ESPN currently has Alonso and Kendricks listed as Out, but I don't know how up to date that is, because it looks like the Cowboys Defensive DC on ESPN hasn't been updated since like the preseason. At least 3 guys that are on IR or released are still showing.
Front 7 Comparison:
Dallas:
Line: Hardy, T Crawford, Hayden, Lawrence. | Gregory, Irving, J Crawford, Mincey
LBs: Lee, McClain, Hitchens | Wilson, Gachkar, Wilbur
9 Good players, 3 Stars.
Philadelphia:
Line: Cox, Logan, Thornton | Hart, Allen, Curry
LBs: Barwin, Ryans, Kendricks, Graham | Jones, Alonso, Hicks, Curry (again)
9 good players, 1 Star.
The difference is really in safety play. I don't think PFF is all that great, but they have the Philly safeties as the top duo in the league so far this year, so that's something. I didn't look at how they ranked the Dallas safeties since I already know they suck.