I love Dzing - I just got a decant of it, and it's such an unusual, unique and tenacious scent. I love many L'Artisan scents and I find the longevity of Dzing on my skin lasts longer than any L'Artisan scent. I also get a strange 'cardboard box' note from Dzing that I love too.
CO I tried once and there was some particular note in it, that didn't sit right with me - although I think I am in the minority here on BN because most people go gaga over CO.
I am assuming you have tested and like both, right?