Winter Tire (17Rear Spacers on Stagged Premium Setup

I am taking delivery of a 2015 2.0T Premium RWD in the next couple of weeks, and already have my winter set-up confirmed (4 x 225/45R17 on 17" Painted Silver OEM wheels). My question is around spacers on the rear wheels - do I need spacers to bring the wheels out far enough so that they do not look "sunk" on the premium? Would this actually be required from a stability/wear perspective? How much farther are the mountings on the AWD model vs. the RWD setup?

Thanks for your help!