The team at iFixit got their hands on a gold Apple iPhone 5s and did their usual teardown of the device; opening up the phone, the innards are similar to those of the Apple iPhone 5 except for the cable connecting the fingerprint sensor to the Lightning port assembly and a missing pull-out tab for the battery which was seen on the predecessor model...
Source: http://www.phonearena.com/news/Gold-Apple-iPhone-5s-gets-teardown-treatment-from-iFixit_id47603
Source: http://www.phonearena.com/news/Gold-Apple-iPhone-5s-gets-teardown-treatment-from-iFixit_id47603