Tested on the Samsung i8910 Omnia HD

Major highlights

Opera Mobile:

  1. More fluid browsing
  2. Better User Interface and elements
  3. Tabbed browsing
Skyfire
  1. Better home screen with social media integration
  2. Faster browser load times
  3. Support for flash/ajax scripting/javascript
...and both of them are free, You can download the browsers at these links:

Download Opera 10 Beta 2 here

Download Skyfire 1.5 Beta here or by directing your mobile browser to http://m.skyfire.com