A teardown of Apple’s iPhone 5s and 5c by research firm IHS reveals just a few internal differences between the new phones. IHS estimates the 5s costs Apple between $199 to $218 for components and assembly — the lower cost for a 16GB model, and the higher cost for the 64GB model. The iPhone 5c is estimated to cost Apple $173 for the 16GB model, and $183 for the 32GB model. IHS analyst Andrew Rassweiler pointed out that Apple is “spending…