I don't suppose Megan will do many tiara-type events, will she? Maybe in the far future, if Harry goes to things as a stand-in for William when he becomes king?
Sophie's profile isn't all that high, but that seems the best place to be to me - all the privileges, a good bit of the work (she does seem to do a lot, in fairness), but not half the scrutiny. Although she had her fair share and then some with the topless pics and the Fake Sheik thing - she had her baptism of fire too. The Royal ladies need a support group!