Short Version: Samsung BlackJack, 10,800 minutes, 120MB Data Transfer, $1,440 USD in a 2-year contract.
Apple iPhone, minutes on demand, data transfer on demand, $640 USD. And Apple controls the whole iPhone experience.
And that iPhone experience can cost a lot more than 1400 in two years depending on usage patterns. go phone prepaid gets way too expensive if you're going to use the phone more than occasionally. Data on demand is even worst, at $10 per megabyte. If you use the phone to connect your laptop to the Net, expect a huge bill.