I agree that it is very unlikely that both will be catching for the Sox next season. I would like to see Swihart converted to either 1B or 3B, rather than trading him, but I understand the need to give up someone of value to get something of value in return.
I read a couple of days ago that Swihart, by far, has the most wild pitches assigned to his pitchers when he is behind the plate. Again, I have nothing against Swihart, but this is yet another reason why I prefer Vazquez catching, despite his lesser offense.