No, and anyone who claims they can is guessing. wishvane tells you what a genre realistically produces: what a typical game does, what the top of the genre does, and where the money tends to land. Whether yours beats that comes down to your game, your marketing, and some luck. It sizes the opportunity; it does not predict your outcome.
Wishlists are private to each developer, so any wishlist number wishvane showed you would be invented, and we would rather say nothing. Follower counts are public, but a follower count on screen is a vanity number, so wishvane keeps it off the page; if we ever use followers, it will be quietly, as one input to an estimate, never as a headline.
It depends on how much the genre's tag has to work with. A genre report is built from a SteamSpy sample of every game with that tag, and wishvane shows you the sample size so you can judge it. A big, well-tagged genre supports a confident report; a thin or fuzzy niche gets hedged, or wishvane says it cannot place it yet rather than generalising from a handful of games.
They answer two different questions and are never blended. The first is the whole genre, from a SteamSpy sample of every game with that tag. The second is only the games people have looked up on wishvane in that genre, a smaller, self-selected set, and the page says so.