What is the difference between all of the iPhone's and the Samsung Galaxy's I just need to know What is what for a phone i want to purchase?

What is the difference between all of the iPhone's and the Samsung Galaxy's I just need to know What is what for a phone i want to purchase?
There are very few differences between the iPhone and the Samsung Galaxy phones. Mostly it is just a matter of size, where the iPhone is smaller, but the Galaxy has a bigger screen.