I wish they were, but no, same minigames.Regarding the inability to choose where to go, what is the Japanese BW Wiki saying? You're correct, after five of these areas are unlocked it's going to suck.
Also, are the minigames different in the Sky World?
Anyway, do we even have any indication that there are more than three areas now or that there will be in the future? Normally I would think it's a safe assumption since Nintendo seems to want people to keep coming back to this thing, but considering we only see three different backgrounds in the hide-and-seek games and that they created such a small selection of minigames, I'm not so sure how much they bothered with the areas themselves. ...though I guess they could just recycle backgrounds and unlock a Forest Two and so on. I'd laugh if that's how they handled it. :P