The White Sox are competing in a tough AL Central with the Minnesota Twins and the Detroit Tigers both possessing the ability to challenge them, but that division is nothing like the AL East. The Orioles are competing against the New York Yankees, Boston Red Sox and the Toronto Blue Jays for supremacy and that's difficult when you consider that two of those teams (Yankees, Red Sox) have a strong nucleus already and have deep pockets also for any needed down-the-stretch spending. Personally I'd love to see the Orioles outlast the Yanks and Red Sox, but it's going to be extremely difficult for them to do so.
Meanwhile in the Central, the White Sox have the ability to put a stranglehold on the division because of their consistent aggressiveness. This team is 13-3 in one-run ball games and that's because manager Ozzie Guillen doesn't change his approach to baseball in close games. Most teams start trying to swing for the fences and start to put pressure on themselves, but the White Sox put pressure on opposing teams by constantly threatening to run on them in any situation.