Have you noticed, that blizzards is creating a lot of tanking rings and amulets with completly same stats but with different names? look at rings from totc content:
http://www.wowhead.com/?item=47888 - 10man totc
http://www.wowhead.com/?item=47731 - emblems
amulets from totc content:
http://www.wowhead.com/?item=49306 - 10man onyxia
http://www.wowhead.com/?item=47872 - 10man totc
in icc it looks even worse:
http://www.wowhead.com/?item=50790 - 10man icc
http://www.wowhead.com/?item=50447 - 25man icc
http://www.wowhead.com/?item=50375 - av rep reward
def dodge hit, thats all