For some time now, I've been gathering information from owners of the SLC3.
More or less all of them agree that it is a good granfondo frame with a predilection for climbing and race geometry.
Most of them also feel that comparing it with the SL8 or other similar frames is rather risky.
It is worrying that some well-known YouTubers have received defective forks and that the after-sales service is not the best.