Old saying:
If your rich and your kids are smart, sent them to Stanford.
If your rich and your kids are stupid, sent them to USC.
I don’t know how accurate this is.
The “old saying” does not comport with modern reality. USC is extremely hard to get into, especially if you are a white male. The SAT scores at USC are second only to Stanford and CalTech west of the Mississippi. This is due in no small part to the large number of foreign students who enter with high credentials and pay full freight. This is why people feel compelled to pay bribes to go there, as well as UCLA, Yale and the like.
You may want to check this to at USNews.
Stanford is more selective, but USC students are far from stupid.
Stanford:
3.95 GPA, 4.8% admission rate
https://www.prepscholar.com/sat/s/colleges/Stanford-admission-requirements
USC:
3.73 GPA, 16% admission rate
https://www.prepscholar.com/sat/s/colleges/USC-admission-requirements