Played today with BHB7 16 gauge. See two posts up for my set up.
Serves: Powerful, but not as big as with BHBR. I felt like I could grab the ball more, however.
Forehands: Had some issues finding the feel at first, due to the stiffer nature of the string. After I got used to it, I started pocketing the ball better, and I saw slight dips in the ball's parabola due to spin. Good for the spin fiends.
Backhand Slice: I'm restricted to slices due to injury, but slices were like a hot knife through butter. I liked it!