FWIW, our adult volitans could, and would most likely make a snack out of our adult fuzzy in a nanosecond.
i dunno if the volitans would survive the ordeal, but i suspect both fish would probably die in the process, which is something we just won't risk. we've had both fish since they were little "peanuts", and put a great deal of time and effort into their care and upbringing...they're definitely pets now.