iPhone 4S, iPhone 4, vs. iPhone 3GS [Specs Comparison]
Model comparison of iPhone 4, iPhone 3GS, and iPhone 4S, which will be available on October 14, 2011.
iPhone 4S, iPhone 4, vs. iPhone 3GS Comparison
From Apple, comparing battery life, camera specs, dimensions, and more:
New 16GB, 32GB, and 64GB iPhone 4S + 8GB iPhone 4 will be AT&T, Verizon, and Sprint in the US. Prices are with 2 year contract.
ObamaPacman: Just get the iPhone 4S unless you are really on a budget. The new 8MP and 1080P stabilized camera is worth it by itself.