The Duragloss product I used, (white box/blue fluid) was nowhere near as slick as Four Star UPP. Four Star, on black is amazing as very reflective, very glossy, and initially very slick. The slickness falls off quite quickly however. Using the polycharger on UPP keeps the slickness apparent and keeps the beads more uniform longer. I have also found that UPP used alone with Zaino Z8 (oh, lord not that !) is also quite attractive and does the same but needs to be used weekly.
I hate to knock any product, as I get plenty of PM's denouncing me. I truly find the few Duragloss sealants to look like former Zaino offerings. If I wanted Zaino, then I would use the PRO line as truly steps above their original offerings. Remember, this is a personal observation, but one made while trying around 30+ sealants yearly in a quest to replace carnauba.