Sony z2 and z3 identical no worth upgrade. Review on Sony Xperia Z3

I purchased sony z2 and used for 1month and then purchased sony z3 after using z3 after z2 one thing I notice is that they are identical in every aspect but z3 has 32gb internal memory a bright and better display both have 1080p panel but z3 display is more vibrant and.z2 has a batter camera than z3 both have sony 20.7mp sensor but due to some software issue z2 performs batter but both does not do any better job 20.7mp is just a name it works like 13mp lg g4 perform 10 times batter than z3 in camera but in battery life here is sony for best we can get and build quality is super but glass is very thin if you accidently drop it whole glass will be broken sony use thin glass as compare to.motorolla who use thick.glass give good protection but I was happy with sony z3 atleast for a month but there are many other devices in that range in 2016 way batter than sony