One is a group of former Jews who have been inspired by Christianity to adopt a few of their beliefs, and one is a group of non-Jews (often former Christians) who have been inspired by Judaism to adopt a few of their beliefs. Is it because the Messianic Jews insist they’re still Jewish, even though they’re now followers of Christ, raising the ire of other Jews — whereas the Noahides don’t insist they’re still Christian, or anything else except Noahides? Or is it the Messianic Jewish desire to missionize that appears stronger than the average Christian missionary.
Perhaps its because Noahidism is based on something biblical accpeted by both major religions. (The seven laws given to Noah by God). Without controversy, there is no press.
Noahides should change their name to Noahide Christians. Get a few priests and bishops upset with them for claiming they can remain Christians without accepting Jesus as the embodiment of the Lord. In the words of Bob Marley, Stir it up. They’d get more press, and more converts.