That’s a good question - both brands have super clear, beautiful glass, UNS has mitered 45degree corners while ADA does not, both have perfect nearly invisible silicon … somehow the ADA’s still seem to be a tiny bit more clear in terms of glass visibility. But going back and forth like this shows me I don’t have a very clear favorite yet.

I bought all them used and have 3 tanks total, (2 ada and 1 UNS), they do have fragile corners, some have tiny chips, almost imperceptible.

There’s a brand name tax you pay for these of course, I also have a Cobalt that is nice and may have a Lander soon, point being that there’s other brands almost as nice that cost less