Again, I am not a expert but I think that NS has a much greater Scottish influence, especially in Cape Breton and in Antigonish and Pictou. the Irish influence is very noticible near Halifax. the other thing is the folk tradition that derives from seafaring places, that is very evident on The south shore of Nova Scotia. There is a great diversity of folk traditions in Atlantic Canada and it all goes back Avery long way. the French shores shore of Ns has a very distinct tradition, and has   A lot in common with the French Acadian tradition of New Brunswick And Nfld is whole tradition unto itself!
In spite of the comments above byMusket, there is a vast cultural and traditional history in Eastern Canada and it is thriving and rich in diverse musical offerings. As an enthusiastic but amateur musician I have always found it a place where music is played with great joy and is always welcoming of strangers and travellers.. As they say in rural Nova Scotia ...."how late,'ll play'll ? Great culture, heritage and music !