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here are the screenshots of 4.3 on xperia z...you can also get the roms for z and zl from the above given link..
http://www.flickr.com/photos/111276775@N06/sets/72157638591600843/
this was already posted at
http://talk.sonymobile.com/t5/Xperia-Z-ZL-ZR/4-3-Screenshots-Looks-amazing/m-p/473345#U473345