This site, by Jay Treat, provides a quick introduction to an often asked question. The page is part of the CCAT project at the University of Pennsylvania. Not detailed enough for the specialist, but shows the beginner where the differences are. The site also provides links to other Greek language and linguistics sites. The Biblical Greek mailing list for discussion the Greek text and language of the Bible.
Archives are available.
The list assumes a working knowledge of Biblical Greek. Abstracts are in English, but the articles are not translated, and may be in any of the European languages. An online journal devoted to any aspect of textual criticism, especially, but not exclusively biblical texts.