I have both and like them very much. The cherry chestnut is cherryish color in sunlight. The cherry chestnut is like a swanky, stylish lady ready to be wined and dined while the walnut espresso is like an outdoorsy woman strapped with primitive weapons ready to take on anything that comes her way.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated