Stock - Not many options, slower than others, bugs here and there
Firefox - Poor desktop UA, lacks many of the add-ons that make firefox worth using.
Dolphin - Collects user data, not quite as quick as competition
Maxathon - Bulky and FC's alot
Chrome - BUGGY
Boat - Nice UI, very customisable, but choppy webpages, quick to load but not as stable.
Opera - Quick and loads pages with stable scrolling, but randomly exits alot and has some problems with flash.
Opera Mobile Labs 12 is like Opera without the exits and flash issues and the addition of desktop extensions like ghostery, noscript, etc. For ages I've been asking, why can't Android have a single browser that doesn't suck in one way or another, so far it looks like my prayers have been answered. I'm mostly surprised it's a beta build. Let me know what you think.