My stainless steel comparison, Performed on Sadowsky MV4 w/ Single coils.
*I would like to note that Sadowsky gave me a set of the Blacks for FREE just to try and compare. My MV4 came in w/ Blues and I loved em' so much I ordered a 5 pack of more. While ordering, I brought up this thread and got a set of Blacks for free to compare. In honor of that, this is my comparison. Thanks Sadowsky.
Blue Labels: Looser tension. Great all purpose string! More well rounded, full tone vs. the Blacks. More lows and low mids compared to the Blacks. More present upper treble response as well. Not as much emphasis on upper mids compare to Blacks. Upper mids are present, and these strings cut, but a bit less upper mid punch as the Blacks.
Black Labels: Stiffer tension. Not as well rounded, full of tone, more emphasis on upper mids. I will say they are deff more punchy though! Not as thick sounding as the Blues. I find the Blues to be more all purpose, full sounding and well balanced, where the Blacks sound a bit congested. Upper high's are slightly muted and darker compared to Blues.
After throwing my other favorite strings on the MV4 (Rotosounds 66 & DR Hi Beams) I can now honestly say that Blue's are my new favorite string over all other brands (For my MV4 that is). Great feel under fingers, very responsive to light dynamic fingerstyle. Slap tone is great. Can't get enough of these strings. These, and only these go on my MV4. Over time they'll be auditioning for spots on all my other Jazz basses as well!
Thanks Sadowsky, great string! I see why all of your basses leave NYC with these on them.