I found this article but it only confused me. It seems there's something I don't understand about it because the title favors the HTC, but after reading the article, it made me want the galaxy 2 S:http://www.ibtimes.com/articles/135615/20110419/samsung-galaxy-s2-htc-sensation-4g.htm
I just returned my g2x because it was defective (wouldn't turn on/freezes up for hours). I'm in the same place you are, eligible for upgrade and torn between phones. But at least I know I won't be getting the g2x again. Maybe I'll get the Sensation but if the galaxy is as great as everyone says....if the release will be soon.