Here is a great article comparing the monoliths of the social networking universe. ReadWrite does a great job of breaking it down. What do you think?
Direct Marketing Observations
Digital and Social Media Marketing Insights from Marc Meyer
Here is a great article comparing the monoliths of the social networking universe. ReadWrite does a great job of breaking it down. What do you think?
Direct Marketing Observations 
there no such comparison .both are different and we cant compare them .