I have never used any W&N brushes so i have no idea what they are like but after seeing this same type of debate/discussion on OzPainters and CMON awhile back i thought i might follow the recommendation of the Rosemary & Co brushes based upon the price and quality factor and will say that that are excellent brushes after using them for a few months now.
I have brought 4 of the series 33 Kolinsky sables so far from R&Co and will be looking to purchase a few more in the near future as i like the quality and feel of them and they retain their shape and points well (i clean my brushes roughly once a week), that said though i also use Francheville 424 pure red sables as well and find these to be good quality as well for most types of work although they don`t quite retain their points as good, for rougher type work mostly dry brushing i generally use cheaper Taklon brushes although i may get a set of Sable brushes for this at some stage.
Just my 5 cents worth and i must say thanks to Ritual who i think was the person that i originally saw doing the R&Co recommending