Going back to the original question regarding whether or not WPGR played older music in the early 90’s the answer is yes and no. WOGL didn’t play anything prior to 1955 back then, (Think Rock Around The Clock). WPGR would play a handful of cuts from the early 50’s, ie. Rocket 88 by Jackie Brenston from 1951 or Gee by The Crows from 1953.
That said, most of the differences between the two stations wasn’t in the age of the music but in the style or genre of the music. WOGL was very Beatles, Motown and Beach Boys heavy back then. WPGR didn’t go anywhere near The Beatles, but rather focused more on R&B, Doo Wop, Philly Soul, and esoteric Line Dance records. WOGL played some of that stuff, but WPGR went much deeper into it.
For example, as WOGL was playing “My Girl” by the Temptations, WPGR might be playing “You’re Not An Ordinary Girl” by the same group or “Third Finger Left Hand” by The Vandellas, both well known Motown B-Sides amongst listeners of that music.
Someone else brought up The Intruders. WOGL may have played “I’ll Always Love My Mama” but WPGR would have played “Love Is Like A Baseball Game,” a Philly classic soul record that WOGL wouldn’t touch with a ten foot poll.
With all this said, the style and presentation though between the two stations were very similar in regards to Jingles, ‘hitting the post’ and very tight board work. Hope this helps to answer your question,