Hanasu and Shaberu, what's the difference?

Question:

So in Japan in the Yamanashi prefecture while I was up in Minami alps people used hanasu/hanashite but while I was in Kofu and Yamanashi city people used shaberu/shabette.

I thought shaberu was more of to chat while hanasu to talk but in Yamanashi-shi and Kofu everyone used shaberu instead of hanasu. Is it a dialect thing? I wasn't even aware of the word shaberu until I went to Japan because my sensei only taught our class hanasu.

Answer:

No big difference, but...:

Hanasu is more like to talk or speak.
Shaberu is more like to chat for fun.

Hanasu puts more focus on its contents.
Shaberu puts more focus on its way of speaking.