Eastman uses both mahogany and rosewood across its acoustic range, often in otherwise closely related models. Comparing those guitars is most useful when the body shape, top wood and electronics stay broadly similar, because then the back-and-side material is one of the clearest specification changes.

Two useful Eastman comparisons

Mahogany model	Rosewood model	Shared format
AC322CE	AC422CE	16-inch cutaway grand auditorium, solid Sitka top, LR Baggs electronics
E10D Thermo-Cure	E20D Thermo-Cure	Dreadnought, thermo-cured Adirondack top, scalloped X bracing

AC322CE vs AC422CE

These are particularly useful to compare because the body size, scale length, Sitka spruce top and LR Baggs Element EAS VTC electronics are shared. The AC322CE uses solid mahogany back and sides; the AC422CE uses solid rosewood. See the full AC322CE vs AC422CE comparison.

E10D vs E20D Thermo-Cure

The same pattern appears higher in the dreadnought range. The E10D Thermo-Cure pairs a thermo-cured Adirondack spruce top with solid mahogany back and sides, while the E20D Thermo-Cure uses solid rosewood behind the same broad top and body format.

What about tone?

Players and builders often describe mahogany and rosewood with different tonal tendencies, but wood species alone does not dictate how an individual guitar will sound. Top stiffness, bracing, body dimensions, finish, strings, setup and the particular pieces of wood all matter. Treat the material as a useful part of the specification, not a guarantee of a particular voice.

A better way to choose

Use the material difference to narrow the shortlist, then compare two actual guitars if possible. Closely related Eastman pairs such as AC322CE/AC422CE are especially useful because fewer other variables are changing at the same time.

Specifications checked against Eastman’s current published model information. Individual instruments can vary in feel and response.