I think first we'd have to settle on what we mean by long term, but the operative variable for this discussion is replacement given cap considerations. Because of that, we can't even make the comparison to begin with because we have some data on the 9ers (who are a year ahead of the Hawks in having to deal with the cap) but simply don't have any data on the Hawks yet and won't until this off-season at the earliest. Are the guys who are going to have to be replacements already on the roster or do they need to be drafted? How will they perform as starters and will they actually be able to replace the skill level? We just don't know yet.
Basically, just as the 9ers have, the Hawks will have to lose some Pro-Bowlers and some important role players, and we have no idea how they'll do on replacement. For the 9ers, so far I think they're doing well, but they're also a tad older.
Replacements:
Goldson was an All-Pro who had to be let go b/c of cap considerations. Reid is his replacement, and so far is as good or better than Goldson.
Sopoaga and Francois were important role players who were let go as cap considerations, and so far Ian Williams and Glen Dorsey (their replacements) are as good as them.
Snyder was a cap casualty at RG, and so far Boone >>>>>>>>>> Snyder (after signing a big contract with Zona Snyder was even cut after the year and is now back as a backup for the 9ers behind Boone, who is their best or second best lineman this year).
Delanie Walker was an important role player was was also a cap casualty, and his replacements are basically Bruce Miller and Vance McDonald. Miller has been great, but I don't think these guys have matched Walker yet.
Coming up we'll see if Brock and Wright (and probably a draft pick) can be replacements for Rogers and Brown. We might see if they have or get a replacement for Whitner, if Tank Carradine can grow into a replacement for Justin Smith, if Lattimore/Hunter/James can grow into a replacement for Gore, if Lemonier can grow into a replacement for Brooks, etc.