To be honest, the combination of the spruce top with the rosewood sides/back makes it the bassiest and fullest sounding of all the SA models.
Spruce is generally a very direct and punchy sounding tonewood as a top, that coupled with the rosewood back/sides give it both punchiness and a good low response as well.
The bright one would be the SA-1, spruce top with mahogany back/sides. Mahogany as back and sides give it the brightness.