Numbers on a price tag, the difference in ADSR really makes or breaks the case on stage.
Like others have mentioned, many low end basses have indistinct attack, fast decay, limited sustain and sub par release.
It is not mainly in electronics or pickups, it is the stiffness, resonanse and losses in the wood. Period.
I use good, really powerful amplification, and have still found it hard to "carve out" a solid foothold in the mix, when using low quality instruments. Just swapping to my main axe just solved the issue, right away.
Same jazz bass, same passive pickup config, same strings, and set up by myself to my liking. Same story with Precision vs Precision. Been there, done that.
The player is very good, no doubt about that!
So, let's hear the basses in some slow blues, whole notes across a bar or two at 80 bpm. Then let us appreciate the "vocality", complexity, richness and sustain from a proper instrument, be it $100 or $5000!