Do you like your iphone? hardware improves as the newer models are released. sure we can knit pick this, but essentially with each release the device is better.

I have both.

that said, use what you like. if you've never had an android based smartphone -- try one.

both are proven devices and both are great.

as long as you are not considering a windows phone or a blackberry (do they still exist?) you'll be fine.

just think about how you will be using it and what other devices you have around you.