To me the C208 just offers refinements over the RC263 that at least at the current sale prices, make it an easy choice for MY needs at least.
This was from a post I did about my observations between many centers I tested
This is about the c208
"Much more expensive than the others but when testing it isolated it blew me away.
First, the looks and size…to die for! Except I HATE piano finishes specially with this one as it kept reflecting my projector back! Piano finishes must die for HT speakers!
Ok rant over..now the quality of the sounds, I don’t want to get all romantic here but it gave almost a live performance vibe to certain moments like the previously mentioned Jenny Lind scene from Greatest Showman. The sound is very full with good bass (not sure why the bass results were so weak when measured here as it measured better in my room), and very wide dispersion created the best soundstage and connection to screen experience of all the centers tested."
Dont get me wrong, the RC263 is great but the C208 is just better.