Re: Bruce for Upton?
Jay and Justin have about the same arm. Well above average, very accurate. Jay has a stronger bat as a hitter (although Upton takes a walk better, Jay is much better at hitting the ball), defensively scouts think Jay eventually moves to RF where he will be above average and they figure Upton will stay in CF. Upton has more speed, but Jay has plenty of speed for himself.
Personally, I wouldn't make the trade because in the end I think Bruce is the better hitter and the defensive difference is marginal, especially for the time being. Add in the fact that we brought the kid up and developed him and it just makes sense to keep him.