Wasn't that Carolina that dominated Chicago? Both those are NFC teams while Pittsburgh is AFC. Carolina dominated them because Chicago didn't do anything about Steve Smith. Seattle subsequently dominated Carolina because they stopped Carolina's only ace - Steve Smith. (As well as the rest of their passing game.)
I meant during the regular season.

Near the end of the season, Pittsburgh played Chicago and owned them.

Seattle's defense is worse than Denver's, especially against the run. Pittsburgh had no trouble scoring against Denver <i>at Denver</i>. I don't think they'll have any trouble scoring against Seattle at Detroit.