A set of comparison photos on Flickr illustrates the size differences between the iPad, iPad mini, new iPhone, and iPhone 4S. In one photo, the iPhone 4S rests inside a pre-production case for the new iPhone, which is taller, but not wider, matching the rumored 4” screen. These items are compared to a pre-production case for the impending iPad mini — believed to have a 7.85” screen — which is seen fitting easily within the footprint…