I watched both growing up, and I personally love BMW. Mainly cause it was part of the TGIF lineup and Friday nights in my house growing up was everything!
Plus, Wonder Years I couldn't really relate to. It was an 80s show about the 60s I think. As a little kid, what the hell do I know about the 60s. But a 90s show about kids growing up in the 90s, now that's something I can relate to.
BMW also delved into some pretty serious topics. Family death, cheating on your girl, losing babies, the struggle of being married young, inappropriate teacher/student relationships (which had both Savage brothers in it) , and interracial relationships. Show was dope.
Also, Topanga was fine af. Other than DJ from full house, she was the first thicker white girl I'd ever seen on tv. She wasn't pencil thin and she was still extremely hot. I had her pics in my locker in elementary school.