I think Apple would have won, as far up the ladder as the case would go, which isn't far. My legal background is not in that area, but that's my assessment. But you think paying someone (IF THAT ACTUALLY HAPPENED---Lawyers and PR firms have made lying and strategic misdirection an art form) a settlement prevents someone else from publishing confidential information? What? More like an inducement for easy cash.
No, I don't think that paying a settlement will necessarily prevent copycats. What I think it will do is keep the whole situation much more quiet than either a victory or loss in court. Sure, we're talking about it here, but we can only speculate as to the terms. So, maybe Apple was on the road to winning, but they were more interested in making this go away -- hence the settlement. (And for the record, I still don't think they would have prevailed. But now we may never know for sure.)