使用solr比使用Lucene .Net有什么优点?

We are trying to incorporate full-text search into our product. When searching for comparisons of lucene and solr i found that most people mention the obvious difference that lucene (and lucene .Net) is a library, while solr is an application. Some people also mentioned solr features such as hit highlighting, but the lucene .Net contrib library seems to support them as well. The only feature i have seen that is supported in solr and not in lucene is document field typing.We are trying to incorporate full-text search i