In another thread I proposed that if you play 1 striker up front, you need to have midfielders that can move beyond the opponents defense (which Arsenal have in abundance) and with the ability to score. This fear factor takes a lot of focus away from your single striker. Giroud does a lot of inter play with a mobile midfield. He is also very mobile himself. This style does leave you open, and as we all know Arsenal do get hit by quite a few sides. In answer to your question, I believe he is not better than our strikers, but he gets better service from a more creative midfield.