Aaaaaaaaand......
I'm close, but you are still the lightest.
I feel like your frame is better than mine.
On the 2015, I only have:
-8R Fact carbon.
-External cable routing for the rear brake.
-An internal routing for the rear deraileur, but not as good as yours.
-The headst is made of Al. Same with the dropouts and the BB shell.
There is still room for improvements; top of the line tires, Magura MT8, XTR pedals, carbon bar extensions, titan screws everywhere, german ultra high end stem and seatpost, Fibula crankset....
But this would be crazily expensive.
So;
The 2014 Sirrus have an amazing frame coming directly from the Roubaix.
The 2015 frame is probably not as good, but if you want a special flat bar road bike geometry, you have to buy a 2015, 'cause the 2014 is a regular frame with a flat bar.