I have looked at the RAF but Im 24 so too old to join as a pilot, plus ive heard it is a lot harder to get in, especially as a jet pilot.
I don't know who told you that, but it's tosh. There are slightly different scoring systems for RN or RAF applicants, but it is not much harder to get into one service than the other.
However, if you are good enough to be a jet pilot, (age aside), I would wager it's easier to achieve in the RAF than the RN - not because of lack of standards...... how many Jets do the RAF have compared to the RN - what if you are a great stick man but your navigation etc is not great?? To be a single seat jet pilot, you have to be pretty damned skilled - 2 seater jet pilots are still very highly skilled, but at least you have a nav (sorry wso or whatever they are calling it now) - and that option is in the RAF!