Okay, NOT 594s, but I have recently played, side-by-side, a pair of "singlecuts" in the traditional style by the same high end builder. (NOT with a G on the headstock!) The solid one sounds big and fat, just like you would expect. The chambered one (no f-holes) is also solid wood (rather than plywood), but much lighter. It definitely has the sound of "air" to it, with a "chimier" tone.
I would not say one is "better" than the other. But I definitely plan to keep both of them----They are different enough that they fill a different niche.