I am not sure about 6 but for L7 many of our girls did a full for vault - meaning a front handspring with a full twist. This still has the 10.0 start value. (At L8, it has a 9.5 start value)
At L7 you definitely see some variation in vault - but not much. FHS still dominates (at least for this year! I think things change for next year with the intro of timers at L7)
I wonder how much. They have also been practicing 1/2 on with yurchenko and tusks. She has also mentioned doing round offs and saltos as well but I do not understand what the last 2 are.