it is like asking which one you would date? Angelina Jolie or Scarlett Johansson hehehe
Well if you see purely as an investment you should try to get gold bars of course, but not all of them! If you get a 1g gold without assay it will be cheaper in the market compared to a 1g valcambi in the assay like you have. But in the melting time it has the same price!