Not a stupid question at all FJ!! Actually a very smart one!

Identical (monozygotic) twins are created when a single fertilised zygote splits, so are genetically identical. Fraternal (dizygotic) twins are are created from different sperm and ovum, so whilst they share some genetic commonality, it is no more than any other siblings.

Although growth patterns are partially genetically determined, they are also influenced by environmental factors, which even in twins raised in the same environment, are subtly different enough to account for slight differences in growth patterns in identical twins.

I would imagine that in the case of teeth, they would cut in the same order, but not necessarily at the same time. Hair would grow at the same predetermined rate, but may be slower or faster depending on other factors like health, vitamin intake. Growth spurts may happen at slightly different times (particularly adolescent growth spurts - I recall studies which demonstrated a difference in the start of puberty/menstruation in identical twins).

HTH