If you pick a Launch Server, you're not behind on your own server. Everyone there started on 5 Oct, the same week you did. The five-day gap only matters if you join an Early Access Server, and even there it closes faster than it looks.
Founder's Pack players get a five-day head start from 30 Sep. In an MMO that sounds like a big lead. In Aion 2, most of it is money, not levels.
Does Early Access progress carry over?
Yes. There is no wipe. Everything Founder's Pack players earn during Early Access carries into the full game, so their head start is real on their own servers.
On an Early Access Server, the head start shows up in three places:
