networkn: Motorola Defy+ and the HTC One S. I just went through this with my wife, in the end I got a really good deal with the Galaxy SII and a week on she loves it and doesn't really notice the size, but does notice bigger, better screen, more power, better battery life etc.
But if you place galaxy s2 next to a xperia ray there is no competition in which one looks better form and the screen in my opinion. It has that extra clarity due to the ppi detail. Not knocking the gs2 I had one - great phone but too big and not inspiring in a design aspect. (for me anyway)