Weibo has more function than twitter.
Weibo can post picture, video, other content directly instead of only links like twitter.
Weibo allows every users to follow and favorite famous people and interest.
Weibo let you play games. (Twitter DOESN'T).
Weibo every comment can be like, comment, share, or store JUST LIKE FACEBOOK.
Weibo is easier to use because it has less control over interface than FB.
Weibo only valued at $3B while facebook at $60B.