If we talk about differences there must be because the vyb front end is a new front end, so there will definitely be differences.

For quality posts on the vyb front end I don't really know. Because there aren't too many posts that are made directly using the vyb front end I see, as well as the comments. But yeah for quality post curation and engagement on the vyb front end page is quite a lot. But not posts made using the vyb front end, only using the vyb tag.