"In North America, early sporty models were known simply as the Sport Sedan and Touring Wagon. Later models were given the GT and GT Limited nomenclature. The 2006 Legacy model brought forth a limited run of 500 Spec B models. Starting in 2007 the Spec B became a regular production model (albeit a somewhat limited run). All Spec B models feature an improved suspension system by Bilstein, navigation system (making the Spec. B the sole MT Legacy to get one), exclusive (to the Spec B) interior, 18" wheels, and additional aesthetic modifications. 2006 Spec B models have a 5-speed manual transmission while 2007-on models have a 6-speed manual transmission."
http://en.wikipedia.org/wiki/Subaru_Legacy
Seems silly to not at least take a drive to check it out.