They're both earworms, so I'm not going to play then now, but that's no problem because I still remember them well. This is good clean fun--thank you.
Slight advantage to "I Think I Love You" for the writing--more complex and interesting.
Slight advantage to the Partridge Family as a group because of Susan Dey (I don't care if she can't sing) and Danny Bonaduce, who made a pretty good reality show star years later.
Musical competition:
Team Partridge 77
Team Brady: 75.
But as for the tv shows, Brady Bunch is a true classic, and the less said about The Partridge Family on tv, the better.
Btw, did you know that Shirley Jones and Jack Cassidy had several albums together? I just found this one at a thrift store a few weeks ago:
https://www.discogs.com/release/4078776-Shirley-Jones-2-and-Jack-Cassidy-With-Love-From-Hollywood