User blog comment:DirgeOfCerberus111/Adeptus Custodes Vs. Grey Knights/@comment-2253300-20110819114042/@comment-2253300-20110819121810

I disagree. A squad of Grey Knights banished Angron during the First War of Armegeddon, though at the cost of their lives. Meanwhile the Custodes Squad sent to Pluto got killed by the Lord of Nurgle, Festernius. An Adeptus Custodes squad could not have faced Angron. There are numerous other reasons why the Grey Knights would win in a war. I actually got into this subject with SniperGhost on some article's Talk page, but I can not remember which to save my life.