Talk:Benedict Arnold's Sword/@comment-28082245-20160725110252/@comment-5782071-20160725121418

http://loreandlegends.blogspot.com/2008/07/muramasa-and-masamune.html?m=1

Not sure if there's a better source, but this site says Masamane was the better swordsmith because his blades were holy, while Murasama blades were known for bloodlust. Both could destroy medical creatures, just from reading the first paragraphs.