D'addario strings have a reputation for being consistent in quality across their range and their EJ48 High Tension are in line with the company's quality.
There aren't that many 80/20 strings in the nylon string side of things and for those who haven't used them before I would say the bass strings are brighter than their conventional counterparts. I myself generally prefer the tone of 80/20 strings be it nylon strings or steel strings as the brighter tone compliments my playing style, they tend to favour separation over sustain from my experiences.
The treble strings I imagine are the same strings as the ones from other Pro Arte High Tensions sets and they are very consistent across the strings, little showing of the often flabby sounding 3rd string. I'm not entirely sure but it felt a bit thicker and more substantial than other nylon 3rd strings I have come across.
I found with these strings, the High Tensions of the strings allowed down tuning to DADGAD without any problems and the bright basses tuned lower allow the strings to have still have a little sparkle.
These are great strings and I highly recommend them to anyone who is looking for a bright sound from their strings with the consistent quality of D'addario strings.