It is a difference and this is not a front office that is ever going to promote someone from AA to the majors. There's absolutely no reason why Brito should be blocking anyone. The OF Depth is fine, if Grichuk, Gurriel, Hernandez go down we still have Biggio, Drury, Sogard, Alford, Davis and I guess Pompey too.
Wall is going to have to be added to the 40 man in the offseason regardless.