It is preferred to live in a zombie apocalypse then an alien invasion apocalypse

First I'd just like to notice that in two of those items that Pro mentioned, humans survive with little to no societal damage. Things aren't looking too great for the aliens already.1) I will admit that aliens could be geniuses. I would merely point out that in reality they are absolute fvcking idiots. For instance, the Martians in War of the Worlds neglected to see if, say, the most common virus on the planet among the people whom they are eating might have disastrous consequences. Granted, they are not as stupid as the aliens in Signs, who dissolve if exposed to plain old water (which makes up most of the planet), but that's still pretty stupid.Remember, the aliens in War of the Worlds survive by blood transfusion. They also don't bother to test the blood of a totally alien organisms to see if it might be toxic, or simply useless.Zombies are less intelligent, of course. But it doesn't matter as much for zombies, because they basically walk around groaning and trying to bite people. Matters a lot more for aliens, who if they miscalculate could end up warping into the Sun.2) And alien technology could very well be their weak point. Consider--in "Independence Day" a flaw in the operating system (see above) resulted in their total defeat. Meanwhile, their technology could be salvaged, resulting in the overall quality of life possibly improving after the invasion. For instance, aliens might have access to unknown or unavailable forms of energy production, which we could reverse engineer.3) I would like a source for this. The wiki for The Walking Dead states that they can only die through destroying the head. That is hardly easy kill, especially since most weapons fire bullets.4) Conceded.5) Depends. For instance, in Falling Skies the aliens use humans to make skitters, one of the main ground forces of the assault.7) Sure they can cross such things: They walk. Since they've got no fear response, don't need food, don't die of exposure, et cetera, many of the things that are barriers to us don't affect them. Not to mention that in The Walking Dead the zombies are by definition global: Anyone who dies anywhere becomes a zombie unless you destroy their brain.Anyhow. On to my reasons:1. An alien attack can be seen coming. A zombie attack would not be. Aliens have to come from space, where we've got a lot of telescopes and sensors scanning. We'd be able to see them before they reached the Earth, and if they came out of warp in the solar system we'd have days to prepare.Zombies as portrayed in The Walking Dead would simultaneously attack from every morgue, every graveyard, every New York street corner with no warning. Zip. I'll choose an enemy I know is coming, thank you very much.Furthermore, the zombie bite is not commonly known about at first, and if you get bitten you are incapacitated and probably will die. If the bacteria responsible evolve to spread through the water supply, we are well and truly screwed.2. The aliens want to kill us all, but all the aliens don't want to kill us all. A civil war can happen between aliens, and could result in a rebel faction helping us gain technology (for example, Falling Skies).3. Because the zombie virus is global, the military would be paralyzed—every cemetary, every morgue, would be ground zero of a zombie attack. Thousands would be killed in the initial attack, and since zombies are effectively immune to bullets unless you get a headshot, the military’s standard weapons would be useless.The fact that any body turns into a zombie, and there is no cure for the virus, also means that you’ve got to keep constant vigilence even if you manage to destroy all the zombies.You can never defeat the zombies, because you are the zombies! Or will be one, at any rate. Every single body must be destroyed within minutes, and failing to do so means that you’ve got another potential outbreak.4. Aliens tend to have a glaring weakness that is easily exploitable and results in their relatively quick defeat. For instance, the aliens in “Independence Day” had shields that could be taken down by uploading a virus to their mothership, and the Martians died of the rhinovirus. Other movies and books tend to collaborate this. As stated initially, the aliens in “Signs” would be defeated by a passing raincloud, the aliens in “Godzilla: Final Wars” somehow missed a kilometer tall giant lizard, and the aliens in “Plan Nine from Outer Space” are so incompetent that their idea of destroying the world is reanimating three dudes and hoping they can stumble their way to victory. All these aliens are defeated quickly, though not necessarily easily—for the most part, they are defeated within maybe a month or so of their initial attack. It’s over quickly, and society gets on with whatever it was doing before. The alien technology can be used to improve quality of life in the future, too—aliens might have access to fusion power.