Well...I guess the brief answers to your two questions are no and no. The closest matches would be between the neck pickup of the L2500 and the L1000 (5-string version). The locations and nature of the pickups are the same, but the L1000 has a different, passive coil-tapping electronics set-up to give you parallel coils mode, single coil and something called the OMG setting which filters one of the coils to give a fatter tone—while the L2500 has series and parallel coil modes and an active/passive option with a high end boost available in active. So, they'll really just sound close with the neck pickups only, and both in parallel mode—but after that they'll diverge. Bass and treble controls are identical passive roll-offs in both, though. The 5-string Kiloton has the sleeker, SB-2 type body and its one pickup is further from the bridge than is the bridge pickup of the L2500. This is the position of the single pickup inherited from the now-deleted L1500 bass. As well, the electronics in the Kiloton are all passive, with a series/parallel/split coil switch—again not the same as what's in the L1000 or the L2500. The three basses are just...well...different. If you're new to G&L, the place to start is almost certainly the flagship L2000/L2500 and see if the characteristic MFD pickup sound is what you like. You get more tonal colours and pickup/electronic options with the two-pickup basses for sure. At that point you might be able to sort out what end of the available tones best suits and think about whether the L1000 (super-duper-P-bass) is the way to go, or the Kiloton (punch machine) is the way to go. Hope that helps. It's confusing for sure.