don't only consider the traffic and work with both the sources. These sources not only giving traffic but also provide back links. so, try to collect back links and traffic from both the sources
They aren't mutually exclusive. In fact, you should do article submissions, then bookmark those submissions. This way you get the best of both worlds - content syndication and social voting on that syndication + back links.
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Both are very important Off page optimization methods.In article submission you need to write a descriptive content related to your site.There you can use more key words.So, it more effective to get noticed by the Google.In social book marking, the content is less.You are just giving a small description.So, Article posting is more helpful for getting back link as well as Page Rank.
if done properly then it is social bookmarking although this is a long term strategy. article submission can trickle in visitors but you are more likely to benefit from back links to your site. just look at how big companies take social bookmarking seriously and how much they spend advertising their sb sites
Through social Bookmarkings you will get direct visitors but through article submission you will gain search engine positions and from there you will get more targeted visitors as they will be using the keywords you used for SEO. its difficult to predict which one would provide more number of visitors to your website.
In my opinion both will help to drag traffic for your site. They both have their own value and both are really very effective process and will help you to get good search engine ranking position.
Article submission VS social bookmarking
