If I have to decide between both...
hmmmmm...
I would go for the Meca 10 Black Magic, due to the marvellous caliber.
It shows Hublot technology pure and Hublot manufacture skills.
The Big Bang Unico, has the Unico caliber, that is the first inhouse caliber, a Hublot milestone.
Ceramic is a perfect material , but this will not help any further

If you had asked for the Big Bang Unico All Black... but that was not the question.
I am excited about the result.
Cheers,
Thorsten