It al depends on how the pickups are wound. MM humbuckers are wound on the low side, so that gives them a bright tone. My neos are bright, but I designed them to sound fuller in the low end. I wanted something that sounded good soloed, and didn't thin out. The Sidewinders are partly based on Lane Poor Bilateral Twin coils, so they sound like a single coil, but don't hum. I wound them a little hotter to give them more output and a warmer bottom. My older Sidewinders were wound a little lower and have a brighter tone. The neos are a bit louder. The Sidewinder Jazz pickups are brighter, but the neo Js are fatter sounding, while still having a bright top end. Is this for a bass with J shaped pickups, or MK-1s?