Actually,When it set to visit that mean only this visit journey data. while it set to visitor that mean many time visit journey data.
If you have a broader container nested inside a narrower container (e.g. a visitor container nested within a visit container), it should behave identically to its parent container. In other words, if you nested a visitor container in a visit container, the visitor container should behave exactly like a visit container.
If you are seeing behavior that indicates otherwise, please post an example and I'd be happy to discuss it further!