@paok1970,
Holy Cow Paok , good q, in spite of some 80+ yrs in The Journ, nev'rast myself
Yes, no, apolos, Ok, but dunno. Far's I know, both'v'm are used allatime
So ask3ed my BH, who is much smarter'n me, and she agreed
But there must be a subtle diff !! So, FBM, Rag, Blue, Mac, Punk, Rog, Hal....help...
Golly I was 40 in 1970