After watching a bunch of videos thanks to DAKKA and WARSEER advisers, I realised a couple of things : there is the GW fur and the other furs. There is the "long thin S method" and the "V shape style". So I went for the "other GW S & V school"... ;)
I feel relieved that the fur is looking better, even though I had to keep the previous "side pelts". So as to stop brainstorming at work on how should I sculpt my Sprenger's pelt, I'll leave it as is.
Once again, thank you very much everyone for your support and tips !
Here are the results (*drumroll*)
Once cured, I'll give the borders a bite so as to make it more, erh, edge ...