It basically boils down to the physics of construction a bolt-on physically produces more thump (of course electronics plays a factor also),but two peices of wood on-top of each other has that effect of the thump where as neck through are wood side by side offering more sustain..........but to compare apples & oranges, two basses with the same construction but w/diffrent electronics is like the orange it's gonna be way more juicier than say the apple.,,,,,,,,,,,,,,,,,,just look an electronic package it will tell you how much juice the fruit has to offer.