30% less powerful than the mts1200. What are you looking for in the SS / or next bike. A few guys on here can support your decision.
The SS rake is more stable than the 1200 but has less power and comfort than the 1200. Wind is about the same, it's perhaps marginally stronger on the 1200. Dash and electronics is the same as the 2016 model of the 1200. Many parts are transferable from the 1200 to the SS.