Guess Blog or Ezine articles?

It's not powerful for attracting visitors to your site, nor for backlinks. (But those aren't its purposes, anyway, to be fair).

It's a possible way of achieving passive syndication, if your purpose is to try to get others in your niche to re-publish your article. That's its only purpose, and even that isn't nearly as good as approaching people yourself with the article and asking them directly if they want to publish it.

Don't put your articles in article directories hoping that customers will find them there. It's much better to put them on your own site. And don't submit to an article directory anything that isn't already published and indexed on your own site, anyway. (They don't need unique content, and it would be a mistake to give them any).

So, to answer your question, guest blogging is probably much better - overall - than Ezine Articles.

This thread will help you: http://www.warriorforum.com/main-int...ml#post5068872

It's possible, of course, to use exactly the same article for all three purposes: publish it on your own site first and have it indexed there, then submit it elsewhere as a guest post on blogs, and finally put an additional copy of it in Ezine Articles. Many people who build their businesses through article marketing have done this combination, in this order, plenty of times (and to many of us, the order matters!).

I think it depends. I always make sure to put links to my website or blog within my author profile so that it will be included at the end of the article no matter where it is republished. To be fair, I have not published on ezine in several years so I am just assuming you can still do this. I think the chances of people finding you and following your links are much better if you are guest blogging, but if you are giving people unique and useful information, chances are your information will get around.

A guest post on the right blog is much better than an article on any article directory.

You should do everything. Publish your article at your own blog, then submit it to EzineArticles, then write articles for other bloggers at blogs that get a lot of traffic.

If you're going to guest blog, make sure that the post is more than how awesome your product or program is. Recent quote from Google's Matt Cutts:
"The problem is that if we look at the overall volume of guest posting we see a large number of people who are offering guest blogs or guest blog articles where they are writing the same article and producing multiple copies of it and emailing out of the blue and they will create the same low quality types of articles that people used to put on article directory or article bank sites.
If people just move away from doing article banks or article directories or article marketing to guest blogging and they don’t raise their quality thresholds for the content, then that can cause problems. On one hand, it’s an opportunity. On the other hand, we don’t want people to think guest blogging is the panacea that will solve all their problems."
Link Building Is Not Illegal (or Inherently Bad) with Matt Cutts

Be honest with yourself about whether your article would fall under this situation. You might want to self-publish and post on an article directory, and then look to blogs that accept guest posts, figure out their audience, and write specifically for the target blog.

I like in-context blog post links.

I think guest blogging is better because article directory has lost more of it authority due to the Google update. But if you want to guest blog, it should be for a blog that get decent amount of traffic

Alexa is totally write. I stay away from article sites now. I leave my old ones on there but I would much rather put it on my site, ping it after that and then I would do a guest blog or something like that, but google is going to see it first on my site.