Aware of the electronic difference, but pickup location? First I’ve heard of that.
I’ve played a few Kilos, and they were all in the tonal ballpark of the L-1500, about 90% there.
Same here. I'm also fairly certain the Kiloton's pickup is in the same spot as the L-1500's, and when I tested a Kiloton its series and parallel settings sounded exactly like my old L-1500 in passive mode. However,
some L-1500s have their pickups closer to the bridge, in the same location as the L-2000's bridge pickup. I recently saw one of these at the Philly area guitar show. So, if one of these oddball L-1500's is one's frame of reference, then yeah, the Kiloton's pickup is further from the bridge.
I used to have an L-1500, and my SB-2 kicked it and a couple of Fenders right out of the herd. I found the 1500's usefulness varied widely across different rigs and in different rooms. At its best, it sounded fantastic, so if you have a rig that flatters the Kiloton you'd probably love it. At other times, it just had too much high midrange: it's a thick bridge pickups tone as opposed to a slightly tighter neck pickup tone if that makes any sense.
The SB-2, on the other hand, is as plug-and-play as any Fender and provides all the thickness, MFD slam, and growl you could want. I find it much more useful than the L-1500. Every so often I consider selling the SB-2 because I gravitate toward my J-basses and M-2500, and would prefer a maple fretboard for an SB-2, but then I fire it up with a band, and realize how much I'd regret letting it go. It's a fantastic bass.