Is “The Investiture of the Gods and Journey to the West have different settings for Yang Jian” true?

In Chapter 040 of "Investiture of the Gods," Yang Jian is a disciple of the Chan sect's Yuding Zhenren, assisting King Wu of Zhou in the campaign against King Zhou. In Chapter 006 of "Journey to the West," he is the Jade Emperor's nephew, Erlang Shen, who heeds summons but not commands, residing at Guanjiangkou. According to "Investiture of the Gods, Chapter 040," the former text states: "弟子乃玉泉山金霞洞玉鼎真人门下，姓杨，名戬；" According to "Journey to the West, Chapter 006," the latter text says: "乃陛下令甥显圣二郎真君，见居灌洲灌江口，享受下方香火。他昔日曾力诛六怪，又有梅山兄弟与帐前一千二百草头神，神通广大。奈他只是听调不听宣，"