I still don't understand how one person can work as a DBA for one company and then in next role at another company be a architect, it is the difference in skills or experience that I am after.

How do you transition from DBA to Architect, or to put it another way, if I said that I was a database architect at a position, how would someone be able to tell if that is true, what form of questions/experience would back that up.

For all I know, I could have been able to call myself a database Architect for years now, only reason I haven't is because I have not understood the difference in roles.