Lets put it this way.
Dolphin Browser on Android > iPhone Mobile Safari > default Android 2.1 browser.
Safari still edges the default Android browser, but unlike iPhone, Android does offer alternative browsers, where devs take the WebKit browser and add all sorts of features on it.
For example, Dolphin browser.
Not only does it let you do customized gestures for the browser functions, it can take the page you're looking at, and share it to Facebook, SMS, MMS, Twitter apps, or any social networking app installed on your phone.
Another feature Dolphin browser has, is when you're looking at a Youtube embedded video, or you're in the mobile YouTube page, clicking on the video offers you an option to download the video on MP4 format into your SD card.