I have used but don't currently use the DR Black Beauty strings. They sounded better on my Jazz than the Dean Markley Blue steel strings that I used for many years. A friend of mine was endorsed by DR and suggested I try them as that was what he used. So I got a set and put them on my 1982 Jazz Bass. They did sound better than the Blue Steel strings and were better balanced although playing the low notes on the D and G strings often sounded thin. So instead of playing an E on the 2nd fret of D string I'd play it on the 7th fret of the A string for a fuller sound. Same thing with that higher A. I'd play it on the 7th fret of my D-string instead of the 2nd fret of my G-string.
They looked nice on my Olympic white Jazz with stark white pick guard, pickup covers, and numbered control knobs. Bad news is that they didn't last very long for me. We played most Friday nights hosting an open mic night at a small brew pub plus usually two 4-hr. gigs per month on Saturdays. Inside of two years my Black Beauty strings turned into Speckled Gray Ugly strings and the back of the strings were super shiny where they contacted the frets. So I went looking for different strings.
About 6-years ago I switched to the LaBella White Tape Wound strings. They are smoother than flat wounds, which took a little getting used to after using round wound strings for over 30-years. Unlike most flatwounds though they do have a lot more of the higher harmonics. And they are so well balanced from string to string that I can play the E on my D-string or A on my G-string or on the 7th frets of my A and D string, whichever one is more convenient to my current hand position. There is very little difference in the sound between the two and you'd be hard pressed to tell me which was which. So I like those a lot.
LaBella makes 4 different colors of tape wounds. The opaque black ones have the warmest sound and the semi-opaque white tapes have the brightest sound. They also have a gold core and copper core set with the semi-opaque tape and they are somewhere in between the black and the white for sound. I chose the white ones to go with my white bass and luckily accidentally picked the best of the tape wounds for my bass, not knowing that their different colored tapes had different sounds.