"I have several examples of both , my take...

Crossbows are more accurate in the hands of most people and are easier to shoot well with out the training needed with a regular bow. Most crossbows are more powerfull
....Downside is that crossbows are much slower to reload. Also in my experance harder on thier strings and arrows ( bolts)

In my opinon both would have limited vaule in a Zombie attack , I guess better then nothing but not near as effective as even a .22 rifle
....Arrows don't really have stopping power since they normaly kill by bleeding out the thing shot and don't have the "shock" of a bullet , that combined with the difficulty of
accurate shooting would make for a poor choice I would think

"

"X-bows can be shot from a prone position of cover, but reloading them there requires rolling on your back."

"Thats funny "

"Nice opinion,of course they are better than something.
A .22 rifle would only be good at 25ms with a shot to the skull,sub-sonic rounds would be completely ineffective unless you were right up close."