yours should be more polished, in my view. I do think that the piece looks cool with that finish, but it's not what I expect for a polished model. If you do care, I strongly encourage you to contact Shapeways (firstname.lastname@example.org) and request a reprint. They say they are working on this, and I believe them, but you've got to be happy with your piece. Here's a picture of two polished versions. The one on the right is not polished to standard, and it looks like yours. You have my full support here. I do believe Shapeways will do the right thing if they get the customer feedback (and not just my feedback). Anyone who encountered this issue should write to them.