Duster VS Dart

I wonder why the Demon was such a poor seller compared to the Duster? the Dart front end was far more aggressive looking that the Dusters and the Demon taillights are cool too.

I've heard several times that some people had issues with the name "Demon", despite the cute cartoon character, and that's why the changed the name to Dart Sport in '73. Didn't sales go up afterwards?