Well the http://ffxiv-fanfest.com/eu/uk/events.php does note the keynote speech/special announcement so I doubt they would just rehash what was told in NA lol. There is most likely going to be some interesting information though I would agree to say that it should at least only be 10 dollars considering it's a one day event compared to the two day event in Las Vegas. It is a little odd they charge 20 again.

Then again I guess the reason could be that they dont' want people to feel cheated for paying 20 for moogle attire where people who paid for EU event only had to pay 10 lol.