I always find the "does the wood make any difference" debate to be a lot like the climate change debate. No matter how many of the most highly respected luthiers say wood makes all the difference, there's always a group of players that claim it doesn't. I recently went through an experience with my new Sadowsky where I was able to try that bass with three different Sadowsky necks. So, exact same bass and three different necks. All necks were maple with pau ferro boards. So, in theory, if the wood makes no difference to the instruments tone, the bass should have sounded the same no matter what neck was on the bass. Nope. That bass sounded markedly different with each of the necks. Do I think everyone is able to hear the difference? Of course not. To my wife, or my son who plays and hasn't yet developed the ear for picking out different frequencies, the basses sounded the same. To myself and a couple guys I know to have good ears, the differences were night and day.
I also believe that the necks make the most difference. Body wood has less of an effect in my opinion. I hear the difference between ash and alder and a stronger more even midrange with alder and a hair brighter top end and slightly scooped mids with swamp ash. More to the OP's original post, it's important to keep in mind that every bass you play will sound different. I don't care if they are clones of each other, there will be slight difference. Once you start talking about different brands and different models, then all bets are off. There's just no way to judge what a certain wood sounds like by saying that I liked the ash body Fender better than the alder body Music man. You have to use the sonic properties of the various wood species and a rough guideline to their tone. Every piece of wood will sound different.
I also believe that the necks make the most difference. Body wood has less of an effect in my opinion. I hear the difference between ash and alder and a stronger more even midrange with alder and a hair brighter top end and slightly scooped mids with swamp ash. More to the OP's original post, it's important to keep in mind that every bass you play will sound different. I don't care if they are clones of each other, there will be slight difference. Once you start talking about different brands and different models, then all bets are off. There's just no way to judge what a certain wood sounds like by saying that I liked the ash body Fender better than the alder body Music man. You have to use the sonic properties of the various wood species and a rough guideline to their tone. Every piece of wood will sound different.