iOS iPhone 6 Plus, assets look tiny

Is there a reason our game which has been tested for months and looks fine on iPhone 5, iPhone 6, and Samsung Galaxy tablets looks really distorted on the iPhone 6 Plus? The assets in general are much smaller. The odd thing is, when I compile it on the mac and produce builds for the client, it looks find on their iPhone 6 Plus. But when they take our code and try to compile it themselves, it has these issues. Is there some XCode setting that would control this that they might be using but I’m not?

Are they building using the Lime tools? Are they using the same version you are?