What are the primary differences between A Textual Guide to the Greek New Testament: An Adaptation of Bruce M. Metzger’s Textual Commentary for the Needs of Translators by Roger L. Omanson (Editor) and A Textual Commentary on the Greek New Testament (UBS5) by Bruce M. Metzger? I do know that Omanson's work was based on Metzger's but I am not sure which is better to use and more credible in academia.