Interesting about the 845/476S info from Collinite.
I find it interesting that the 845 absolutely does *NOT* stain trim for me, but the 476S can in some situations :think:
Side-by-side, the 845 did look better to me (on '00 GM Pewter metallic) but the differences diminished over a few washes. The 476S stayed slick and beading considerably longer.
For some reason 845 doesn't stay slick/beading on the plastic bumper covers of the A8, but the 476S does :nixweiss Also, the appearance differences between the two are more pronounced on Audi silver, with the 845 looking quite a bit better (at least to my eyes).