Edit: sorry, my post was incorrect.
There are 3000 more tickets than Ayreon Universe, but there is the chance it will sell out I am afraid.
I do think there were more "bigger" names last time. I know some Nightwish fans that went because of Floor and Marco, for example. Furthermore, the sunday show took about a day to sell out after friday/saturday immediately sold out. But I don't want to be the guy that tells people tickets will be available while they are not.