Iphone UI is a little bit better. Android is open and google products works very well on these phones. Regarding development it's easier to develop apps for andorid. Only problem is fragmentation. Different screen sizes and os versions can make lot of troubles.

Another problem is the set of countries you can buy programs from Android market, and even smaller set where you are able to sell your own.

Also you can do some freelance jobs in your field. You can make some money and learn more about B2B.