Brook vs. Spence: Who Has the Better Chin?

I have seen a lot of threads talking about how Spence got buzzed by Larte, a guy who is not a big puncher. What these threads don't mention is that Kell might have an even more suspect chin- and against Spence, that isn't good news. "Bubububububut, Kell took everything Lil g had and stayed on his feet so his chin must be granite, right?" Aaah no, not really. Triple L was noticeably sloppy that night while Kell moved very, very well. It's possible that Brook didn't get caught flush much. But we do know Grimbumpkin caught him solid at least once, to the tune of a broken orbital socket...but that aint the chin or the temple, the usual places you get knocked silly. But we DO KNOW Kell can be wobbled and it doesn't take a big puncher to do it. We already know about Carson Jones a guy with a 55% KO rate. Not mentioned as often is Karl David, who Brook faced in his 14th fight. David has a career 30% KO ratio, yet he did this: https://www.youtube.com/watch?v=hjweITRzXpo Then, there is also the fact Kell was wobbled in the Senchenko fight. Yes, Senchenko does have some pop but he isn't the puncher Spence is. Here is that clip: https://www.youtube.com/watch?v=Ieqs53GOHfY The point is, if you want to discuss whether or not Spence has a glass jaw, you might also want to check out Kell's china first.