I think the title sums it up. I just want to know why one or the other is better for continous integration builds of Java projects from Svn.
One difference is that Hudson is the product of a single genius intellect—Kohsuke Kawaguchi. Because of that, it's consistent, coherent, and rock solid. The downside could be some limitation on the rate of progress. However, Kohsuke is incredibly prolific, so I wouldn't be too worried about that. And, it's extensible, so if there's something Kohsuke doesn't have time for (or doesn't want), you can probably do it yourself.