It's kind of like asking if Pepsi or Coke is better.
It boils down to personal preference. Try both out and see which OS you prefer navigating.
I have had 4 iPhones and stick with them for two reason.
1) I'm used to the layout, including the keyboard. I can text without looking and on a virtual keyboard that's not too easy.
2) resale. I buy the newest iPhone for 200, use it for a year, then upgrade to the next one for 200 and eBay my old one for atleast 300. Rinse and repeat.