Dynamic fonts = Unity. Their dynamic font system is horribly bugged and was, like many other features, left unfinished. Dynamic fonts provide no kerning information at all. I advise avoiding dynamic fonts if possible. Use NGUI bitmap fonts. They look predictably on all platforms. You can create them from the Font Maker.
Also, for an outline effect like that select the bitmap font and add an outline (bake it). Doing it by choosing a label option means the text is drawn 5 times instead of once.