Buying an iPhone is not confusing. You have a 50% shot of getting it right (unlike the 100% success rate you'd had a few months ago). But if you still need help in deciding which iPhone is best, here's how we would rank them all.
There are something like one million Android phones for every person on the planet right now (plus or minus one). Most of them suck. Many are great. Here's the definitive list that tells you which is which.