Comparing my UV5 and my MV5: I was surprised

I just compared my brand new UV 5 string (ash/morado) to my older MV5 #M416 (ash/maple).
Both have the same Sadowsky single coils, new strings (Sadowsky Blue Steels) and I made sure, the distance between the PUs and the strings was the same on both basses.

Experience would lead me to experience a more lively, crisper sound from the MV (being an ash/maple bass).
But the opposite is true: the UV is a bit louder and snappier in all PU positions....

Could this be due to the UV's body being bigger?

edit: I measured the neck and found out that the UV's neck is 2mm broader at the nut than the MV5.
I thought, all the Metros had the same neck dims.

Does anyone know more about this?