Fiddle and violin are really two different instruments. Fiddle players lower the bridge so they can more easily play two or more string simultaneously.
I'm not looking for a facebook argument here
But, I have always been told that they are the same beast; just the style of play is different. So, I did a very quick look on the network which conveys all the truth
Lots and lots of hits, but they all seem to be of the type:
https://www.johnsonstring.com/violins-facts/fiddle-vs-violin.htm But, honestly, I have no idea what I'm going on about here!
I think Grapelli would have been great playing a couple of spoons ... he was a great musician who happened to play a fiddle/violin!
I really hope I can play guitar on my accordion one of these days
Let's all continue to make music! Good for the mind and soul.