What I find it odd that there had to be at least a few long service personnel who worked on or served with both types in operational service.
Dickie Haine started off flying Furys in the thirties and flew F4's at Edwards.
In my own service career I knew Arthur Vine who was a Mustang pilot during the war and finished up as an instructor on the Phantom. (his son amusingly being a Shackleton pilot at the same time...)