Share your experience!
Hi,
I have been happy owner of xperia P until today. I compared the XP camera with XU camera, and I'm dissapointed. Photos from XU are clearer and more saturated, while photos from XP are a little blurred.
First photo made by XP and second by XU.
i Guess u had an issue with the camera modes. were u using the automatic mode because sometimes the automatic sensor acts fuzzy.
Plz compare here
http://www.gsmarena.com/piccmp.php3?idType=3&idPhone1=4436&idPhone2=4437&idPhone3=5033
try to play with the settings of the camera like white balance, iso, exposure to get the output you want,,im sure you will love the outcome if you get the right settings 
There is indeed an issue with Xperia P camera, but there is no way that Xperia U can capture better photos. I also own both Xperia P and Xperia U, and noticed that when they both were on 2.3 Gingerbread, Xperia P took way better photos.
There must be something wrong with your xp, please check your cam settings if its using 6 mp and change it to 8 mp, xperia p has a great camera than xpu