The Mojo is a unique and awesome combination of Tele & Strat style pickups and P90 pickups. They are, very literally (and usually surprisingly), truly P90’ish in character. How P90 they are vs how Tele or Strat they are is the difference between the Mojo 42 and 43. I also use different screws of in different applications. So, if you’re using the pickup primarily for jazz, I’ll use an unplated screw of a particular alloy.
The Mojo 42 is about 50% P90 and 50% Tele. It’s brighter, sweeter, and retains more of the vintage single coil sound while still offering some of the grunt and output of a P90 & with less of the P90 mids than the 43.
The Mojo 43 is 75% P90 and 25% Tele. It’s darker of the two with more mids and aggression.
Both pickups are truly exceptional additions to your instrument and have what I consider to be the widest range of tonal possibilities in one pickup.