I very much doubt Einhart herself is anywhere as powerful as her original, just like Vivio. Surely the originals of those two were at least as powerful as Nanoha. So, if Einhart's dream is to face something as powerful as the Sankt Kaiser, she wouldn't last for 10 seconds. I'd say her dream won't be fulfilled (following her current way of thinking) until she has been in a real deadly match with Vivio with no restrictions and really needs to struggle to win, or lose, but in either way it would be evenly matched and the winner decided by a hair thin margin.