The European ones are more chaotic but you get much much more interaction with the actors - and because they are also getting more interaction with each other both on stage and behind the scenes, I think their enjoyment of the whole event comes across in every contact they have with the fans.

For instance - Rick Worthy was telling us that his first con in the states he was really looking forward to meeting Seb Roche only to find that Seb had been there for a mere 3 hours the day before. He said that for that con, he was ferried from the hotel to the venue, into the (empty) green room, onto the stage, did his panel, signed autos, did photos and then was sent back to his hotel without seeing any of the other guests.

Creation do photo ops better but Europe does everything else in a more fun way.