Nice comparison, you did a very thorough job of capturing the process at each step.
I'm not familiar at all w/ the Zaino products, but I do have some suggestions about the Meguiar's products:
The products you selected for the cleaner and polish are entry-level at best. You would get much better results using the Mirror Glaze line of products (#9 and #7, which are available at NAPA, Autozone, and Advance Auto). I'm not sure about the cost of the Zaino products, but the Mirror Glaze products are in the $9-$12 range per 16 oz. bottle.
The "wax" you used was the NXT spray product. That is intended as a "booster wax," which enhances the appearance of a properly detailed vehicle in between major detailings. It is not intended to be a LSP. You would get much better results using the NXT liquid or paste wax (or better yet, something from the Mirror Glaze line such as #21 or even #26). I would rank the durability abilities of NXT spray wax about equal with a quick detailer, so don't be surprised if the NXT side is not beading after a week or two.
I would even recommend replacing all 3 Meguiar's products you used w/ a single product: ColoRx. I bet you would get as good a look and better durability than the line-up you selected.
It sounds like I'll have to bring my detailing arsenal w/ me to a meet somtime to really test the on-going (most likely forever-going) debate of Meguiar's vs Zaino.:laugh: