I'll take a stab at the original question.
A good bass sounds and plays great all over after being set up properly with appropriate strings. What makes it good is that once it is set up and playing/sound good, it tends to stay that way for long periods of time. It also helps if the bass is not fragile or easily damaged.
A decent bass is similar to a good bass, but it's somewhat lacking in sound, playability or durability compared to the good bass. Also, maybe it can be a good bass for 15 minutes, but then requires some further adjustment to remain in the good zone.
A bad bass cannot be made to sound or play well - there's something inherently wrong with hot it's made. Also, it may be a good or decent bass with poor quality components that fail regularly.
A good bass sounds and plays great all over after being set up properly with appropriate strings. What makes it good is that once it is set up and playing/sound good, it tends to stay that way for long periods of time. It also helps if the bass is not fragile or easily damaged.
A decent bass is similar to a good bass, but it's somewhat lacking in sound, playability or durability compared to the good bass. Also, maybe it can be a good bass for 15 minutes, but then requires some further adjustment to remain in the good zone.
A bad bass cannot be made to sound or play well - there's something inherently wrong with hot it's made. Also, it may be a good or decent bass with poor quality components that fail regularly.