Good read, guys and gal. I enjoyed it. I had an SV, and I just finished breaking-in a 650, so I found it most interesting. The 650 will be a more practical, versatile super-moto, of sorts, for me, and it will be my wife's primary ride.
Niether one of these things qualifies for "high performance" or "racer replica," and the SV's half-second faster lap time is virtually inconsequential on the street. Meanwhile, torque, looks, ease of use, and comfort are all big-time important, especially in this class of bike, or in any street bike. They both need a suspension upgrade, so I suspect handling will be a draw, more or less.
The 650 is about dead-on where Kawi wanted to be, I think. You just need to know what you really want from a motorcycle.
My two cents' worth, and worth both pennies. Maybe...