difference between cradle cap and dandruff?

A. Cradle Is there into the scalp of the child from the time of its birth so it is going to go away completely by the age of 6 to 8 months or once you get the scalp shaved of dandruff does not go away no matter how hard you try want to stop using shampoos and stuff associate it is going to come back it is like the dry flakes which are always going to stay