Darwin did give him a shout out, the biggest difference here was very likely the levels of self promotion;
Wallace failed to promote his role in formulating the theory as effectively as Darwin.
and Darwin was very much on home ground in the UK actively riding on Wallace's extensive field work and spreading a Darwin flavoured spin on the very material Wallace was writing in from the tropics.
Both were very good writers, Darwin had greater visibility during the early days simply by being there to meet, greet, and lecture.
Many of the "Darwin" ideas in the popular mind came from elsewhere; Survival of the fittest was Spencer and although later taken up as a phrse by both Darwin and Wallace it's almost the active opposite of the more passive (and more correct) notion of Survival of the best adapted.