The Wingman is not a booster per se, it's an additional antenna element that's tailored toward reception in the UHF spectrum, where many more mainstream stations are broadcasting after the changeover to the DTV standard than they were before. The regular batwing has included a signal amplifier for a long time, though I don't know what year that became standard.
Il Carriaggio — 1975 Argosy 24 | Il Progetto — 1976 Argosy 28 Center Bath | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill