You mean if they get there. Right now, only Weaver has pitched in the major leagues. Maybe long term Bailey will be better. And maybe his arm falls off this year. Weaver has produced, Bailey might.
Same goes for Stubbs vs Linecum. Linecum barring injury will likely be in a Giants uni this year. Stubbs will likely be a Dayton Dragon. Maybe he goes all Jay Bruce on the Midwest League. Or maybe he turns in a BJ Szymanski performance.
So far, Stubbs has put up numbers inferior to Jay Bruce, even though he should be more advanced than Bruce.