so, which one is it?
Dolphin HD works really well & is fast. I was using standard Dolphin, until I realized you couldn't use the vast # of plug-ins available for it, so I switched to HD. They are both good browsers. Best thing is to try both and see which one suits you better. I will say the gesture button in the lower left corner of the screen and the side panels in the HD version annoyed me, so I turned both of those things off.
I liked this article although it is from July. I currently use Dolphin HD and am very happy with its performance, although I think it may consume a pretty good amount of battery. I tried Opera for a bit but the page rendering wasn't very good and I didn't like the controls. I used xScope as well but don't really like how much screen space it takes up. If using Dolphin you can get 100% of the screen used by the webpage instead of extraneous tabs and toolbars which I like a lot.