But the GK studio negra stood out from the rest and had a fine tone to it

I've noted a trend in these online reviews that there will always be someone who will pop up and tell people that these instruments are "not as good" (may also be expressed in less polite tones) as their $3K to $5K luthier instrument.

A totally different feel from "classical" guitars I have played, yet allows the classical music I do know to be played with volume and great tone with somewhat lower action yet no buzz from the lower string height.

I am a big fan of this specific guitar because it has a more robust or darker tone to it because of the dark wood

The Flamenco guitars are braced more lightly than classical guitars with the aim of providing a louder, more "percussive" tone than the more heavily braced classicals.