Here are some of my observations of Zaino vs Duragloss. I have used both on the same equipment, tractors, SUVS, etc.. Here is what I observed.
1. Zaino is the most reflective and clear of the two. As I looked at our SUVS from different angles and different times of the day, Zaino is more "shiny" or brighter, at the same time, the objects that are close enough to be reflected off the paint are the CLEAREST I've seen since I've been waxing our vehicles. Used Klasse SG, Meg. NXT. Blackfire, etc. Zaino produces clearer optics. Duragloss is close, but Zaino tops it.
2. Duragloss has the "deeper" "wetter" look of the two. When we go to wash our vehicles, we take the hose, and we spray the loose grime with a stream of water. The paint takes on this glimmering, wet look because of the water on top of it. Well, that is the look that Duragloss has. Like the paint is still wet from the hose.
3. Durability. Both products are really GOOD at lasting for months at a time. I rate durability not just on water beading, but also how easily bugs, grime, and dirt are released from the paint surface when I go to clean the vehicles. It seemed to take Zaino a few layers before the protection became really superb versus Duragloss seemingly offering good protection with just one coat. However, once the Zaino was built up with a few layers, the ease of removing bugs from the front of the SUVS, along with the brake dust from the wheels became easier than with Duragloss.
4. On the different pieces of single stage paint that are on our equipment, Zaino looks nicer than Duragloss. What I mean is that Zaino almost seems to soak into the paint and make it more intense and vibrant. The black wiper blade arms on our SUVs became blacker and shinier. The gray painted frames of our Kubota tractors became darker gray, looked richer, and felt smoother. I applied Zaino to the black running boards on my SUV, and since our dad doesn't always see my vehicle, the next time he was standing in the garage he noticed the running boards, and I COULD NOT convince him that I hadn't repainted them. Now, I applied Duragloss to all the same pieces of paint, and while it made them nice and shiny, and protected from the elements, Duragloss does not produce the same richness of color. Now, if the paint was severly faded and neglected, I don't think Zaino could restore it. There are limitations to what it can do, but it works wonderfully well on paint in decent condition.
5. In the same way that it works well on single stage paint, Zaino also does well on the plastic pieces of our equipment, taillights, headlights, turn signals, smooth black plastic trim, etc.. Again, I tried Duragloss on the same pieces, and it just didn't produce the same color richness that Zaino does. For example, on the SUVs taillights, after appling Zaino, they appear to be deeper red and shiny. Black plastic is now blacker.
The only way you can determine if you like one product better than another is to try both,and see for yourself. Having said that, You can't go wrong with either choice. Both Zaino and Duragloss are high quality, effective products that protect your paint and last for a long time. They each have different characteristics and traits, but in the end, they are both very, very good.