The Samsung Galaxy Note and the Apple iPhone 4S are two big names in the AT&T device lineup, the iPhone 4S display is dwarfed next to the huge Galaxy Note's 5-inch display. but the underlying hardware is quite similar.
Check out the following two part comparison video and see which device comes out on top.
The Samsung Galaxy Note for AT&T features a 5.3 inch Super AMOLED screen with a built in stylus with apps supporting pen input, LTE Connectivity, an 8 megapixel camera capable of capturing video in full 1080p HD, a secondary camera for video calls and is powered by a 1.4GHz dual-core processor with 1GB of RAM.
The Apple iPhone 4S features a 3.5 inch touch display, 8 megapixel camera, secondary front facing camera, up to 64GB of internal storage and is powered by a dual-core processor.
source - PhoneDog