^
I've explained to you a 100 times that retail Z/ZL have excellent screens but you still prefer to play deaf.
Here are two posts from a member at a forum you are a member at:
Post No.1 - Seeing a DEMO Z unit
3 - Sadly, what should have been the best feature of the phone, is the worst. The screen is really bad. Blacks are kinda Grey, and the brightness of the screen is kinda low. But the ppi is very impressive.
Post No.2 - After buying Z
I also got the phone today. Let's just say it's insanely incredible!
Apart from this I already posted display quality measurements in the Xperia 2013 thread that proves retail Z/ZL have 1500:1 + contrast ratio and excellent performance wrt greyscale and color accuracy.
Alternatively go through XDA Indian Z owners thread and read what Iphone 5 and Note 2 owners have to say about Z screen.
*forum.xda-developers.com/showthread.php?t=2106241
You will see many complain about the screen being bad seeing demo units, but once they bought the phone they had nothing but praise for the screen.
Not ONE guy complained about a retail Z screen in that thread over 100 pages.
Anyway @OP
IMPORTANT -
I would honestly suggest you get the Z over ZL. But in any case if the following things worry you then you should buy HTC One or Galaxy S4.
1. You do NOT prefer natural colors but fake over saturated colors and oversharpened images.
2. Speaker loudness is important to you
3. You do not like the idea of opening and closing water resistant flaps everytime
4. You want the best benchmark score.
5. You want excellent low light camera performance only and do not care about daylight camera performance
If any of the above is the case PLEASE do not buy Z/ZL