In the center 100% crop shows that TTartison lens is sharper, but bokeh is more rounded in Leica.
In the corners TTartison is much sharper. Not sure what is going with Leica lens here.
The lens is front-heavy, but medium-small. Focusing is smooth with Leica-style tab and aperture clicks. Feels good.
While the Summarit is a much slower and much smaller lens, this TTartisan lens definitely goes beyond that into the territory of the Summilux level lens. If you need 50mm for Leica M mount, this is the one. It will work on any camera, and it will be working for a long time.
For 35mm this is a different story. 7artisans and TTartisans are close, but both are of less quality than Leica 35mm Summilux.