snow mobile and snow machine are the same thing.
I have never heard a snowmobile called a snow machine before but whatever.... my first reaction to the concept of a snow machine was a snow-making machine. I guess I need to get out more....
SnoGo ..... well put fuel in it !.....:o)
We called em snowmobiles back in the late 60’s early 70’s, then it was as you stated Snowmachine, now my family calls em SnoGo’s.