I think what complicates it, Polks product pages online are not easily browsed as with most speaker manufacturers. They randomly display "lines" of speakers, but fail to actually accurately describe what their "Place" in the line up is.
Reading from above I now get the Signature Elite line up is a slightly revised box and crossover of the Signature line. But Polk does not make it clear, whether one is older/newer or Good/ better or one is replacing the other or whether they co-exist currently.
I feel after browsing, more confused by THEIR site....lol