Feature-for-feature, Eclipse and NetBeans are well matched. In fact, because they are both extensible, any feature gaps between the two can be filled in with third-party plug-ins. Eclipse and Netbeans are rapidly approaching the capabilities of commercial offerings. Most developers won't need more than what these two excellent development platforms provide.
A (very) brief list of the features of the two is also included, their similarities including SVN support and syntax checking.