I have no expierience with Africans or Chinese as breeds, mine are Toulouse, Buff, and Roman, but I’ve heard Africans are quieter than Chinese.
As for guineas I can confirm that your neighbors will probably despise you if you have guineas. My neighbor has guineas, personally the sound doesn’t bother me, but others have described their sound as a Satan’s jackhammer. My grandma has neighbors with guineas and she can hardly deal with the sound.
I would also check with your neighbors first to clear it if it’s all right with them, also check any neighborhood ordinances to see if you’re even allowed to have “poultry” on your property. Geese are definitly quieter than guineas, but their honk is considered loud, even intolerable to some.
Different people have different tolerances too, my geese aren’t a bother to me, the neighbor’s guineas aren’t either, but not everyone is like me.