Which country are you in? Assuming Europe (Germany?), and further assuming you had choice, I'd definitely pick RB first, since they have the better brand. ZS is more boutique in my mind, and would come second. The internal strategy / rotational programs at large & well regarded companies are third.
Whatever you do, don't forget to at least seriously consider an MBA in a few years and try MBB again. Your profile will be different, and hopefully you are better prepared / have a little more luck.