I think part of what seems to inflate Wells over Verne in memory is that Wells staked out so much more territory in the genre: he wrote the archetypical alien invasion, the archetypical time-travel adventure, one of the two archetypical Mad Scientist Plays God stories, one of the leading space-travel adventures, and the most memorable stories about invisibility and "stuff grows big" (those two had more influence in the movies than in print).

Whereas Verne's well-known works are all in the same narrower subgenre, the extraordinary voyage with possible hard-SF elements.