For those of us who are having trouble spotting a difference between their trusted iPhone 4 and the new kid on the block the iPhone 4S with the naked eye, here's a comparison table with just the changes:
If you want to know more what the main difference - a dual-core A5 chip - brings currently and potentially, have a look at our overview of the multicore advantages. If you are curious about the animal that is Bluetooth 4.0, compared to 2.1, here's a scoop.
So with the iPhone 4S in your hand you can go tit-for-tat with any Android road warrior now. When they mumble LTE, large display or Adobe Flash, well... you'll figure something out, but when they brag about multicore chips, you run Infinity Blade 2. When they say Full HD video, you show them 1080p clips of your cat. When they say HD displays, you quote your pixel density. When they tout NFC, you brag Bluetooth 4.0. When they quote activation numbers, you respond with revenue from Greater China. Who's Smartypants now?