Stirner proposed that most commonly accepted social institutions – including the notion of State, property as a right, natural rights in general, and the very notion of society – were mere illusions. He refered to them as "spooks" and defined "spooks" as abstract concepts / social constructs that people act as though really existed. They're essentially "ghosts of the mind" that nevertheless feel so real to an individual that they control the way that person acts and that can spread from one person to another.
Dawkins defined a "meme" as an idea, behavior, or style that spreads from person to person within a culture. Memes, according to Dawkins, are concepts that exist only in our minds, but that spread and mutate in ways similar to the way viruses spread and mutate: they infect a host and get passed on from one host to another, in a symbiotic or parasitic relationship with that host. Religions and ideologies are both described as meme complexes, which are collections of memes often found together.
To me, both concepts seem to be just different names for the same phenomenon. However, I can't say I've ever done any in depth analysis on the different characteristics of respectively a "spook" and a "meme". Hence my question...
Are there any differences / incompatibilities to consider between Stirner's "spooks" and Dawkins' "memes" or are they really just different names for what's basically the same concept?