The assoluta has a green touch and is less soapy than the others. As such, it is my favorite in the line. (In contrast, the essenza's soapiness is way too much for my nose).
But I still prefer other eau de cologne like Nicolai Cologne Sologne or Chanel Eau de Cologne. They have no soapiness, fresh and natural smelling. However, they are true cologne, meaning that they do not last, and one has to reapply. I guess one cannot have everything with neroli.