score:4
I'm going to base the following of an essay by Frans G Bengtsson, "Marskalkarna av Frankrike", found in Sällskap för en eremit. The essay in turn was written after he had read Gabriel d'Orgeval's Le Maréchalat de France and, particularly the part I will take my material from, G.A. Macdonell's Napoleon and his Marshals. I'll be using the word "hate" a lot as a catch-all since it is hard to tell from a short account exactly how strong the dislike actually was. I'll also cover dislikes between all the Marshal's, for the benefit of anyone finding this question in the future. Onward to the actual answer:
The Marshals seems to have rather disliked each other as a general rule:
The following pairs appears to have been good friends: