depends on your preference really. I really like iPhone but i am still using android now because i am used to the system and it is actually not bad even if compare to iPhone, some of the functions not found in iP is actually quite handy like NFC
For me when i choose a phone the first thing is the screen size, for guys like me who wear jeans often will find it hard to squeeze a 6 inch phone into the pocket, so i go for the Sony 4.6'' ZR.
And also my ZR has 2GB ram, 13MP main camera, quad core processor, water resist like Z1, price 1k less than iP5S. So far no complain from me i am a happy android user
But if you are going for android phone take a look at Nexus 5, that was my favorite android phone but sadly when i bought my ZR nexus 5 wasn't on sale yet