Gypsy,

It's actually even more complicated that Desert Dancer says.
There is a lot of diversity in southern Appalachian music.
WV fiddling doesn't sound like KY fiddling.
Braxton County WV fiddling doesn't sound like Kanawha county WV fiddling.
In Pocahontas county WV, Burl Hammons' fiddling didn't sound like his brother Sherman Hammons' fiddling.

I wouldn't be surprised if there was similar diversity in New England.

BUT,
It is more fun to listen to the differences than to talk about them.