Apple iPhone 4 vs. iPhone 3GS: side by side

It has been a few days now since the iPhone 4 has been made available for purchase and there is no doubt that those early adopters are getting a crack at checking out the talked about smartphone. Apple just recently announced selling over 1.7 million units in the course of the first three days it has become available for sale – it's an astonishing figure in every way you look at it. However, we'd imagine there are many people still out there sporting the last-gen hardware, the iPhone 3GS in fact, that might have that slight inkling of moving up to the iPhone 4 in the near future. In this comparison, we're going to compare and contrast some of the different features between the two iPhone handsets so you can judge for yourself whether or not it's a compelling argument to jump up to the iPhone 4.