My sister and brother-in-law once knew a
Victoria whom my brother-in-law always called
Veronica. So my sister would call her Victronica as a joke. Which makes me think they are too similar. But come to think of it, he's the only person I've ever heard of who couldn't remember that a
Victoria is a
Victoria and not a
Veronica. So no, not too similar. I love both names.