There are loads of Galaxy S3 v iPhone on Youtube. They are both on the expensive scale, and have their good and bad points. I would never buy a Apple product on principle because I don't believe in their business ethos, which is getting like Micro$oft.
Best phone ever made is Nokia N900 (which isn't Android) IMO and after 2 years I decided to keep it another 12 months rather than upgrade. Great operating system that was open source (like Android its a variant of Linux), and could have been another option to Android - unfortunately Micro$oft flexed its muscles and paid Nokia $250 million to only use Windows on its phones. That was the end of the next generation of N900's - but the legend still lives on.
Thats my geeky contribution anyway.