These four basses have exact same preamps (passive only for this test), pickups and strings and were set up to the exact same precise adjustments...
Same amp (Glockenklang), same settings, same cable, same place, same player, same noodling, same ... everything. A real test, for once.
The only differences are the woods used.
Use headphones or good speakers.
See also here, page 15, for an article by the great Roger Sadowsky confirming that an electric instrument i