I haven't been able to try out the Z1 but I tried out the Z and I liked it a little more than the Nexus 5 because of how it fit in my hand. What are some major advantages and disadvantages of each phone that you could need to actually see for yourself to identify? Are there any significant differences between the different Android OSes? I'm on T-mobile and cost isn't a huge issue for me. Any other suggestions similar to these two phones, by the way? For the record I like the feel of the Note 2 but not of a Galaxy S phone. I don't suppose there are any other phones that have a similar processor either?