You're asking me if Kawasaki would have made two specific plays. I asked you if Goins would make two specific plays. You can point to those plays as evidence Goins has a stronger arm than Kawasaki which, I think everyone here would agree with. You can't say he is a better defender all around because he does one thing better.
Furthermore, the arm of a 2B is the least valuable tool at that position. Before I hear "hahaha", I;d like to know what tool you feel is less valuable; speed? hitting for average? power? fielding?
We all know range, hands and footwork is what makes 2B D, a strong arm is a bonus. Kawasaki's arm isn't so bad that he can't make most plays, sure he wont make a couple that Goins would over a course of a season, that's about the end of it. Yet, Kawasaki has shown and proven that he has above average hands, range and footwork all over the infield. There is no way that after 9 games you can say Goins and his superior arm is the better all around defensive package. Additionally it's pretty obvious that Kawasaki is the better hitter today. Perhaps Goins will be better in the future but, that time isn't now.