some days ago, twitter release the bootstrap toolkit 2.0, it’s simple and perfect, hope the yii 2.0 Change blueprint to Twitter Bootstrap as default css framework.
thank u <img src='http://www.yiiframework.com/forum/public/style_emoticons/default/smile.gif' class='bbc_emoticon' alt=':)' />
For me it seems that they are almost the same thing by different developers. Even their sites look the same.
ZURB’s prototyping feature leads us to the UI section of docs and you can find the same components in bootsrap’s docs. Also they both have some JS components (tabs, modals, etc).