I tried about 15 different string sets before i decided to go with the tite fite nickel lowrider from DR and since then I use these strings on all my basses.
The sound of these strings is very ballanced and fresh with a full bottom end but not gloomy and brilliant highs but not harsh. When they are new on the bass, i need to days of some playing that they sound exactly as i want it. In this first time they have too much overtones and too much highs but these go away after a little while. From that point on they stay brilliant and round for quiet a long time and much longer every other string i have ever played.
what i also like is the feeling of these nickelstrings. They are very smooth and you can easily slide over the strings without higher noise.
The difference to the other nickelstrings, the sunbeams, is the hexcore string inside, that brings a stiffer feeling than the sunbeams. I like the .45 more than the .40 because of their rounder low end bass when playing finger style, while i use the .40 for slapping.
Overall these are simply the best bass strings I know.