“We just got our hands on the unreleased iPhone 6S Plus’ rear housing!” Future Supplier reports. “Let’s take a look at what changes Apple has made since the previous iPhone 6 Plus.”
“These two housings look almost the same. But if you take a closer look at them, you will see the differences,” Future Supplier reports. “Our source has told us that though the color of the gold 6S Plus rear housing is the same as the iPhone 6 Plus, the material used to make the rear housing is different.”
Future Supplier reports, “‘The iPhone 6 Plus’ rear housing feels smother than the iPhone 6S Plus, while the 6S Plus’ rear housing is stronger,’ [the source said].”

More photos in the full article here.
MacDailyNews Take: Looks like the real deal.
Looks like the power button will still be on the side opposite to the volume buttons. The only thing I don’t like about my 6 plus.
Looks like there could be an illuminated Apple logo too…
Sean, that’s the same Apple logo cut out as the current phones. No illuminated logo anytime soon. They also removed it from the new MacBook so who knows if they’ll ever bring it to iPhone.