There are a lot of indignant comments in this forum right now saying that this or that comparison is bad or wrong. Several posts insist that a particular comparison can't be made.
But look: To compare one thing to another is not necessarily to say they are identical. In fact, it makes sense to compare things that are not identical. Comparing one penny to another would get old pretty quickly.
But comparing apples to oranges is perfectly reasonable. Both are fruit, but oranges provide more vitamin C. Apples grow better in cool climates. Oranges are juicier.
So comparing DeJuan Blair to Charles Barkley isn't necessarily wrong. Both are short, strong and aggressive power forwards. Barkley's career proves that a power forward with sufficient skills can (or could in the 80s) succeed in the NBA despite being short.
Blair still has everything to prove in his career, but the Barkley comparison at least discredits the argument that power forwards must be tall to succeed.