Seem to show that malejealousy triggers a higher CTR in the ads but the conversion rate seems to be overall lower.
Does a unique domain name for a product truly work?
Well, it could trigger again the negative "Marketing/Hype" signals in the prospects emotions especially if the site has no other substance than a sales page only with no possibility to veryfy the credibilty of the author.
The vitalcoaching.com page creates an authority hubb which ads various qualities to the sales page. Maybe those elemenst ad comfort to the prospect and make the buying process easier.
Again, these are just guesses which would need to be confirmed