Strolled into a LBS today and saw a 2013 Supersix Evo Hi-mod frameset collecting dust. Somehow, it's a brand new frame with absolutely no cosmetic or structural damage. They quoted me $1k for the frameset. I'm currently riding 2014 Pinarello Rahza K, which is a bit heavy and labeled more as an endurance frame - I'm looking for an upgrade and something with a racier DNA.

My questions:
1) how different is a 2013 from the 2016 update? I know all the manufacture claims of improved aero, compliance (smaller seatpost, different fork), increase BB stiffness, lower weight, etc. but are the differences that noticeable? I rode a 2018 Supersix Evo (no hi-mod), but don't have a comparison of the previous version.
2) how fair is $1k for the frameset?

Good deal?

They also have a 2016 Orbea Orca OMR framset for $1200. I don't know much about the Orbea, but would welcome any input about either frame (or deal).