And as long as I'm on the topic, Benatar's big hit "Shadows of the Night" was itself a cover. Here's the original.
So that was from 1980. Quite different from the Benatar cover, since Byron was a more Dylanesque singer-songwriter who punctuated his instrumental breaks with a harmonica. Benatar's 1982 version was actually an almost carbon-copy of a 1981 version by Rachel Sweet.
I think the big difference here is the record label. Pat Benatar was signed to a real label (Chrysalis), with a real budget, who could produce an album cover that made her look crazy-yet-sexy (an always killer combination), and who could produce a real video with actual actors in it (Judge Reinhold and Bill Paxton). Rachel Sweet's album cover (from Stiff Records, whoever they were), on the other hand, made her look like a homeless heroin junkie. Too bad. Google her or check Wikipedia to see much better photos of her (the mugshot isn't her, it's someone with the same name). Sweet's version of the song has a tenor sax solo for the instrumental break, instead of a guitar. She gets extra points for that in my book.
Trivia: Pat Benatar's "Shadows of the Night" was the second video to ever be played on MTV.
P.S. This isn't meant to be a bash against Pat Benatar. I still like her, and a few of her hits are on my big playlist.