Teixeira is a Boras client. The only reason the Braves would consider a deal like this is that they don't think they can lock him up on the open market.
I believe Youk's numbers are better across the board.
Youk .314, .381, 15, 63, 56
Tex .271, .373, 17, 69, 54
And Youk is nearly a calendar year older. That said, the money that Manny is unlikely to be making next year has to go somewhere. Why not Texeira?