http://www.anandtech.com/show/4215/apple-ipad-2-benchmarked-dualcore-cortex-a9-powervr-sgx-543mp2/4
Anandtech did some tests with the iPad 2 screen. Apparently, the screens are not the same across all iPad 2. This is not surprising, giving the amount of iPad 2 Apple has to manufacture in a short period of time, using screens from multiple vendors make sense.
However, at least from those units that Anandtech has, it seems that one type has higher contrast than the other. In the 4 units that they have, the higher contrast screens are on the 3G (Verizon and AT&T) versions.
Anandtech did some tests with the iPad 2 screen. Apparently, the screens are not the same across all iPad 2. This is not surprising, giving the amount of iPad 2 Apple has to manufacture in a short period of time, using screens from multiple vendors make sense.
However, at least from those units that Anandtech has, it seems that one type has higher contrast than the other. In the 4 units that they have, the higher contrast screens are on the 3G (Verizon and AT&T) versions.