Guilty as charged

!
I had the Christal before too, and loved it! Gave it to my mom because I can't rotate between that many watches. While my watches are now all automatic, the Christal I owned was quartz so if I didn't wear it enough, essentially I was wasting the battery. If I get a Dior Christal again somehow, it will have to be an automatic version.
Aesthetically, I like the ceramic Dior VIII more than the Christal because it appears more streamlined. It also looks like Dior went more upscale with the Dior VIII, giving it an anti-reflective sapphire crystal (actually makes the watch look a lot more expensive) and also highly polished multi-faceted indexes which sparkle in the light. The Christal doesn't have either.
Also, I like the all-black colour of the Dior VIII. While stainless steel looks good on a watch, it doesn't beat the intensity that black ceramic has thanks to its saturated colour.