On this subject of defense, it has to help the pitching. And I think the Red Sox vs Yankees struggle over the years has always been about pitching. That was true in the 40s and early 50s when NY had the pitching advantage, and also the 2000 decade, when the Red Sox had the pitching advantage--except last year when the Yankees signed the top two FA starters and the Red Sox starting pitching took a dive--with Dice-K, Penny, Smoltz and a poor spring from Beckett and Lester. Wake saved them in the spring, but he is only a half-season pitcher these days.
I still can't figure out how they won 95 games. Their home record, obviously. They are tough to beat at home--with the small park, the soldout crowds, etc.
This year, barring injuries, they should be better. Their pitching should be much better. The lineup is deeper, and some of their pickups should benefit from Fenway , as Gammons implies in his predictions mentioned earlier.