Sounds about right I'm afraid. Whilst boards and interview questions will vary, the standards will all be very similar and it is currently a hirer's market - hence you will need to show a good understanding of the RAF, its kit, where it is, what it does etc etc as part of a demonstration of your interest in the service.
Look on the brightside - as we get smaller and smaller, you'll have less places to try and remember on the map and less Sqns to learn about!
Go to the RAF Careers website and have a look at the RAF locations page - it should have exactly that - a map with all the various units on it by type IIRC.
Goood luck