As far as I know, Dawkins' books give his version of evolution, that is somewhat non-standard and not yet proven. Gould used to write about evolution more as it was widely accepted by scientists on his time. I know they both have disagreements, but as far as I know Dawkins is faster in writing about not very accepted subjects as widely accepted science.
As for your generalizations: I think they're way too sweeping. Gould and Dawkins have written hundreds of thousands of words. Some of those words are probably too daring, others not daring enough; some are words about cutting-edge subjects, some are about classic works in their fields. Some of their words have caught fire in the popular imagination to a much greater extend than their authors intended, i.e. Dawkins' "meme" concept was originally intended as a half-joking metaphor, and he himself doesn't take it too seriously.
But finding a meme these days is like mentioning the long tail. It seems a little antiquated and cutesy.