Since the naming has already happened, this opinion doesn't really matter; but.... I don't like either name.
I get almost irritate anymore when I hear yet another __ayden name. I feel as if someone is trying to be clever - just how many ways can you rhyme ayden? All I'm going to say.
Bobby (and not Robert) seems as if this little boy will never be allowed to grow into his adult name. He will always be thought of as slow, or backwards, or just immature.