The new Apple rumor going around today comes from a user going by the name Old Yao on the Chinese website called Sina Tech. The user claims he has a friend who works at an Apple supplier in China. According to the post, the man's friend has seen the next-generation iPhones on hand at the supplier.
According to the source the iPhone 5S looks very similar to the current iPhone 5. However, the iPhone 6 is said to have a larger screen than the current iPhone. The iPhone 6 is said to be thinner, longer, and wider than the existing device.
Naturally, Apple isn't offering any official comment on these rumors at this time. This is a tenuous rumor at best and I still find it hard to believe that Apple would launch two iPhones in the same year. Still, we will keep an ear out for any further developments on the next-generation iPhones.