Hey, i just give you my experience:
I tested last week 3 basses with 3 wood types. All basses have the same body and construction.
Swamp Ash: Sounds boomy in low end, lot of low mids.
Mahogany: Deep bass and lot of high mids but less high ends.
Maple: Very balanced tone, tight basses, singing mids and crisp high ends.
All basses were tested in 1h, same amp, same cab, same cable same position in the room.
head: Merlin bass amp
Cab: Accugroove El Whappo
Did you test each body using the same neck and same set of strings? The neck has far more impact on tone than the body, IME.