Hi Glen,
I have both the GA Fall limited and a GS6. Tone qualities aside (since it's not a fair comparison as the woods/size are different) after playing both body shapes I personally like the GA size the best. I'm a big guy to begin with at 6'2" 240# and find the GS just a bit too big to comfortable play for any extended period of time. I'm sure if it were all I had I would become accustomed to it, but given the choice, I reach for the GA size.
Cheers,
Mark