Unhappy [q] my xperia z ultra touch screen replaced aftr that its not like old display

hi guys,
my sony xperia z ultra c6803 touch screen got cracked then i gave mine phone to local mobile service centre {not sony service centre} for touch screen replacement they changed new touch screen for 250$.
touch sensors works same as before but the real problem is when play hd videos i seen not good clarity like before nd feels some pixels naked FEELS I LOST MY OLD Z ULTRA
HELP ME DID THE SHOPKEEPER CHANGED MY HARDWARE {or} HE PUT DUPLICATE TOUCH SCREEN
Attached Images
File Type: jpg webcam-toy-photo4.jpg - [Click for QR Code] (50.6 KB, 5 views)
File Type: jpg webcam-toy-photo3.jpg - [Click for QR Code] (55.1 KB, 6 views)
File Type: jpg webcam-toy-photo5.jpg - [Click for QR Code] (46.5 KB, 7 views)
File Type: jpg webcam-toy-photo2.jpg - [Click for QR Code] (54.3 KB, 9 views)