This is solely my experience and not a scientific comparison. I had Ed Fong's DBJ-UHF antenna mounted on the rooftop for a few short months. It worked reasonably well and had an acceptable SWR for my purposes, though I don't have the SWR number recorded.
Unfortunately, I went up on the rooftop to check the mount on a clear day after a period of harsh winter weather, and gave the mount a slight twist to assure myself that the PVC was still nice and tight. When I went back to the radio, there was no reception and a check of the SWR showed it to be extremely high. When I tweaked the antenna, I broke the solder connection in the base, which is my fault and not necessarily a strike against Fong's antenna.
I replaced it with a Tram 1486, which cost more, but is also more robust. I was able to trim the Tram to an SWR of 1.01:1 with the unit mounted on the roof, and I don't feel the need to go check it to see if the PVC is still secure in the end caps.
Reception is very good with the Tram, though I don't have the instrumentation to accurately compare it to reception with the Ed Fong. My signal reports seem to be better with the Tram, though that is subjective as well.
Ultimately, I was fine with the Ed Fong, and I am probably a little happier with the Tram 1486, mostly due to it's robust construction.