He's going to have to play them all and decide for himself.
For what's its worth, I bought a 516ce-FLTD last weekend and love the tonewood combo of the Tasmanian blackwood and Spruce top. The tone is very well balanced to my ears, however, this is on a much larger grand symphony body. I am a strummer, not a picker, so his opinion and milage may vary grately from mine.