thank you; I found something on it from Nature too, and that makes the same point, that the science does not support it (and adds that the original experiments were badly designed): https://www.nature.com/articles/1602104
But anything from grass-fed ruminants is likely to be better than the equivalent from feedlot-fed ruminants, simply as nutrition, and quite apart from the moral case of the better lives lived by animals on pasture.