Ive never used Z16, thats a first, i dont know how ive come to try a zaino Product.
I must admit im not a huge fan of the megs stuff...but longevity was the name of the game in this thread.
I do prefer the "milky" type tyre shines, but normally they hardly last, and if it rains....bye bye! haha!
My favs is Gloss it and Swissvax Pneu...but they are hellish expensive for what they are and dont last.
Maybe i should be trying some Z16! ;)