Well I decided to look around at more information. It seems there are stronger rumors around that it's just the same RO with revamped graphics (which I think the landscapes and architecture look pretty amazing, but would have liked them to improve on a more cell shaded character cast), where you can switch your original character over to it.
It seems they are just trying to get a more international interest (Europe and Amierca, mainly) by starting fresh with this. To be honest I would have really liked it if they don't let characters get transfered and get a more original gameplay style.
BTW. I'm downloading the ROSE online open beta, just at the downloading patches part. It does look pretty cute, but I'll just have to wait and see what the game play is like. This one is also made by Gravity along side another company, I think.
www.roseon.com Check it out, it's only a 300mb download and it's free (open beta).