I don't think there is anything in 066 that is not in 062 with regards to Turn. Well except all the bugs that were introduced with 066 especially ones that affect Turn. One of which is the wear limits are stuck in radius mode so you need to double if using Dia mode. There were quite a few other issues in 066, one was with external homing, another seemed to be with toolchanger macros.
I would never recommend anyone use 066 as it has serious issues, 062 seems fine for me and my machines.
057 worked fine as well but in Turn there was a problem with the toolpath at times, can't recall exactly what it was, it was an annoyance rather than dangerous though but 062 seemed to cure it for me.
Hood