the south of sw.和in the southern part of sw.有区别吗.

the south of sw.和in the southern part of sw.有区别吗.
不过我认为没区别，各位说的好像是to the south 与in the south
请问；
Guangdong is in the south of China.
和
Guangdong is in the souther part of China.
是大家说的这种区别吗。
I am not sure,FYI