I think it mostly depends on how much you are putting on it as far as information. If you have an extensive work history or heavy amounts of info to put in there on your schooling, a simple format works best, but if you lack in that department then dressing it up is a good idea. I always include all previous jobs and schools because my resume is generic and I never know what they're looking for, but because I am the worst at deciding what I want to do, I have a ton of schools and stuff to put on there so simple works best for me.

from what i've heard, simple is key, especially if you don't have much experience.

I've only ever written a CV. These are typically for academic purposes and academic institutions usually expect a lot of specific detail about your teaching history, conference papers, publications, curatorial experience, etc. I do have a pared down very simple version if I do ever have to seek other employment, but I've yet to need it.