I don't. I guess it depends how much credit you give Duquette for the O's roster moves, but the Orioles used more players than any other team in the majors this year as far as I know. That is maximizing on your available resources. All I've heard all year when it comes to the Orioles is "wow, Buck has pushed all the right buttons - it's amazing what he's done with that team."
The A's had rookies and young players, but talent. It was just a question of how they'd perform. No one had any faith in the pitching staff the O's were trotting out there. I'm sure if you asked managers around the league at the beginning of the season if they'd rather have the A's starting pitching options or the Orioles, all would have chosen the A's. Factor in that the A's play 81 games in one of the league's most beneficial parks for pitchers and the O's play in a hitter's park, the production of the O's staff becomes even more impressive.
Buck did more with what was considered less at the start of the season, and he got the same results as the A's with what I still believe was a tougher schedule.
Melvin did a hell of a job, but I don't know how anyone can say he did the better job managing his team.