Speaking from experience, there is no comparison on the two, Z16 flat out BLOWS it away, not even close. The two things I like about the Z16 is that you can control the shine, one thin coat will give you a nice flat black look, one heavy coat will give you a nice moderate shine and two coats will let you trim your nose hairs in the gloss. :w00t:
The other reason I won't use another product is that as long as you let it dry, it flat out won't sling. I've put three coats on mine, just to experiment and no sling whatsoever, as long as you give it time to soak in/dry.
Not trying to push something on you that you don't like in the first place, but just sharing my experience, just in case you get some nut that wants to trim his nose hairs in his tires and demands no sling! :thumbup: