Shot this for a client this morning. I actually shot the same composition with the Loxia 21 and Canon 24 TS-E. I'll work on the Canon version tomorrow and see which one I want to deliver. The Loxia definitely has nicer sunstars.
I did some color corrections in LAB mode and then applied a sharpen filter adjustment also in LAB using the lightness channel. I'm definitely liking the results with this method.