Since performance is everything in a nib, I have a few examples of each of the mentioned nibs, all in Italic Medium/fine size. Having moved them around to various pen bodies, can say that the JoWo (Goulet) nibs are wet, the Knox, Nemosine, and FPR nibs run a bit drier. All give excellent performance, all have required a bit of polishing/grinding, nib-tweaking, and feed adjustment to get that excellent performance. The choice of a particular nib for a pen, for me, depends on the pen body, the feed, and the ink that I am using. But I am happy with just about any nib that is produced, regardless of source. As long as some quality went into it.
More than the manufacturer or pen brand, it's the knowledge that the pen owner brings to the table that makes the main difference.
Best of luck,
From a person's actions, we may infer attitudes, beliefs, --- and values. We do not know these characteristics outright. The human dichotomies of trust and distrust, honor and duplicity, love and hate --- all depend on internal states we cannot directly experience. Isn't this what adds zest to our life?