The difference amounts to a little over 45 million. Now, EVEN if you're the Yankees, that's more than a 1 player difference. I think it's kind of funny that you'd opt to take the most expensive player in baseball from the Yankees and dump him on the Red Sox to make the tide shift nearly $60 million in order to make it seem like a small cap. I think that if you were an accountant that you'd be in jail right about now. We aren't going to fall for that fake trick.
To any team other than the Yankees, a 45 million difference is quite a lot. That's certainly more than 1 player. In addition, look at the Yankees payroll vs. most other teams in baseball. That'll be WELL over $45 million difference, and well over "1 player" even if it is the most expensive player in baseball.
Even look at 2009, the Yankees payroll was 201.5 million, whereas the Red Sox were at 121.75 million. That's a 79.75 million difference, well over 2 A-rod's (or about 6 normal players). Not to mention that this is the difference between the highest payroll and the 2nd-4th highest payroll. It'd be one thing if that was the gap between the highest payroll and the lowest payroll, but that's just the gap between first and 2nd (although the Red Sox aren't always 2nd highest either)