Do "Suonv" and "Pretty Girl" mean the same thing in Guangzhou dialect?
"Seeking a girl" is a sexy girl with a small cloth and a good figure. Most people use this word in private and don't shout it in front of others.
"Pretty girl" is a young woman, so it can be described. So you will often hear people shouting like this in the street. Strangers (such as waiters in shopping malls and restaurants) or people they know can use it.