They are essentially the same as HighBeams, so are bright-ish.
The Bootzilla coated string are a little warmer as they are coated LowRiders.
I like BlackBeauties, nice all round string.
But, you can't beat flats for a good "vintage thump".
As others have and will undoubtedly say, tone is found through a myriad of places e.g. Tone controls, fingers/plectrum use and position, pickup selection, cabs, venue, ear wax, quality of wine drunk that night, hair length, alignment of planets, etc.