Black XS L'Exces has base notes of cashmere wood and black vanilla, heart notes of jasmine and rose absolute and top notes of neroli and black pepper.
I think the original Black XS is sweeter and a little more fruity, more of a daytime scent, whereas this one is a richer, deeper floral and more suited perhaps to night time wear. It still has a bit of fruity sweetness to it (particularly after a few hours of wear) but it's nowhere near as sweet as the original. I think it's a more mature scent than the original. You only need a small amount of it, and I could still smell hints of it hours later, which I don't really think that I could with the original.
Overall I love this scent. It's expensive so I will be using it sparingly since I have the 30ml, but it's lovely. If the original was too sickly and sweet for you, I'd definitely recommend you have a look at this one.
Black XS L'Exces costs £31.50 for 30ml and £42.50 for 50ml from Debenhams. The prices seem to vary from store to store.
Have you tried any of the Black XS perfumes? What did you think?
Disclosure: I was given this perfume as a gift.