Long time ago I read it.Not even close. The disparities between the two movies are too far. Sure you have Corey Feldman playing a pre-criminal Judd Nelson. That's where it ends. The timeline, the economic and the overall class level between the two groups propels them from each other at light speed.
What Stand By Me is prolly a semi-personal memoir of what Bachman wanted incorporated into his childhood, had he had the chance to change it.
Here's another fact. Stand By Me was a book first, whereas The Breakfast Club was written as a screenplay by John Hughes and was never a book.
So, quite some differences.
What the story Stand By Me is trying to convey is the profound loss of innocence. The body being the very catalyst of making the boys into men, and them fending for themselves. If you remember the camping scene, you'll also remember Jerry O'Connell's character dropping his burger on a stick into the fire, thus causing him to omit dinner that night. It was little dollops of detail that made the story a page turner.
In the climax, the gang finally sees the body and has a run in with Kiefer Sutherland's Lost Boys character and his gang. Again, the symbolism is when the boys fight back and Gordie pulls out a gun to repel the bullies, is a metaphor for innocence lost.
You've read the short, right?
My point as to the similarities of Stand By Me and Breakfast Club is a group of people getting to know more about each other than ever before and getting closer & bonding because of it. Finding appreciation for fellow human beings. Both stories are group therapies. Thinking the grass is greener on the other side is folly. The joker kid thinks the jock kid has it better or the preppy kid with rich parents has it easier when all have imperfect lives.
And to your point Stand By Me has the loss of innocence factor to it in addition to different personalities bonding.
We should start a book & movie club, Flynn. What is your address again? I'll bring a house warming gift in the form of some neighborhood bums (cats), that I don't feel like feeding anymore. Some torties. Some more black than orange. One more orange than black. When I look at them, I think orange really is the new black.