Zaino tends to have different characteristics on different colors. for example, my Steel grey metallic bimmer is not as reflective as blacks and reds. It has a deep, WET look, almost as if the car was coated in glass. On black, it is more of a reflective shine, under a coat of glass, and tends to look "liquid at times." As for depth, well I am still waiting for someone to post a picture of DEPTH for comparison. Pictures are tough to judge though......that is for sure.
All these users are using Z1, Z5, and Z2 with Z6 in between. After a few coats the car will look incredible. Most of us prep the car well, remove swirls, clean, and clay. Then we start the zaino process and in some cases never have to strip and start over. Once a swirl free zainoed car is polished, additional swirls that develop tend to be in the polish layer and Z5 fills them a lot better. So when swirls develop we switch to z5 to fill them and get that perfect look back, and then switch to Z2 for higher gloss. On light colors however, I do prefer the look of Z5. If all goes right, I just give the car soem extra cleaning with a clay bar twice a year, and wash and QD weekly. I tend to layer on about 5 coats of Zaino and then sit back and enjoy the shine for a few months before adding more coats.....
Hope this helps........