When water gets Z2 if you leave the lids albeit minimally. People I know have never had that problem has since been sure to wet it. So do not worry.
Regarding the rest are very very very equal. Too much. Anyone going to offer you everything you want, and both almost the same level.
It ends up being a matter of taste because of their similarity. I would stick with Sony because I like his cape customization and design. In the remainder, if someone tells you that one is better than another lie.