Thanks everyone for your thoughtful replies. I'm sure they are both excellent machines with great service, but in the end, I went with the Gamma 602FC, and I upgraded to the top-of-the-line Gamma clamps (for just the price difference between the two types of clamps). The machine is beautiful! The Gamma customer service is wonderful!
2 Yonex VCore 97 Tour, Kimony leather grip (just 10.5 gms.), ALU-Rough @ 54 lbs., 1/2 inch O grommet dampener, Wilson Pro overgrip. 355 grams.