Guys,

I just bought the ZL and I have been using the Galaxy S2 for some time before that. Thus my brief comparison of The ZL is done against the  S2 :

1) Sad to say Sony's screen still not as good as Samsung's Amoled. Colors are not punchy and contrast is very low. Somehow, the ZL performs OK with pics and video (perhaps due to Bravia 2 engine) but generally the screen is disappointing.

2) The ZL has a nice form factor and design with good quality materials being used. Nicely engineered. Physical camera button is a plus point.

3) As far as the UI is concerned, there is still a lot of room for improvement. Fortunately one can down load other apps from Play Store to change it some aspects of it.

4) The ZL tends to get very hot when playing games and watching videos.

5) Camera is mediocre - nothing to shout about.

6) Listening to music from the speaker is OK and loud enough.

7) LED notification light available. Use the app Light Flow to configure for missed calls, notifications, low batt warning etc.

8) Speed is good. There is some lag at times but nothing serious.

On the whole, I think Sony still has some distance to go before truly being able to go head to head with Samsung. I hope Sony can improve on the points above with future models.

This is just my humble opinion. Thanks for reading.