So over the course of last few months we have had the opportunity to review both Articlesbase.com and Ezine articles. We have found articlesbase.com to be much more intuitive and easy to use compared to Ezine. The user interface of articlesbase.com is much more in tune to our needs as it allows an easy to use interface along with some really nice features.
Our articles that we submitted got reviewed a lot faster and with minimum difficulties whereas we rant into several issues with Ezine. The Ezine editors seemed highly finicky and arrogant and caused a lot of hassle in us wanting to submit articles. Almost made us remember of what it felt like to deal with DMOZ (*pukes). After a while we just gave up as nothing we submitted was good enough. On the flip side,the editors at articlesbase.com seemed much more receptive and respondent to our needs.
In terms of search engine optimization,we have found articlesbase.com to be tuned to our needs. Our articles were easily indexed and showed up readily once they got approved.
So in short,stick with articlesbase.com and you will be happier.