While Bosox Rule has a point (Leo Mazzone seems to get the absolute best out of pitchers), there's a big difference between John Burkett and Jaret Wright.
If I were the Yankees, I'd be concerned about him and Pavano though, because Javier Vazques is far superior to BOTH of those pitchers, and he struggled with New York last year.
On the same token, I don't think Clement is going to be a revelation for the Red Sox either.
Assuming the Yankees get Johnson and the Red Sox sign Clement:
1. Johnson vs Schilling-- advantage Yankees.
2. Mussina vs Wells -- advantage Yankees.
3. Pavano vs Clement-- pretty close considering Pavano pitched in a pitchers park, had better defense behind him, and Clement had no run support....Considering nobody knows how either is going to adjust, I say DRAW.
4. Wright vs Wakefield -- Advantage Red Sox. Wakefield's inconsistent, but Wright hasn't proven he can be consistently good, or pitch well in the AL, or handle the NY pressure.
5. Brown vs Arroyo -- Advantage Yankees. Over his career, Brown has proven he can be a very dominant pitcher. Arroyo has pitched very well for the Red Sox, but as far as pure talent and credibility is concerned-- Brown has the advantage here.
It's clear that if/when the Yankees finally get Johnson, their pitching staff will be superior to Boston's.