The Kilo feels weight wise the same as my Hour.
The bikes were both set up with risers, deep-v's on formulas but the Kilo had a much shorter gear ratio, and the Hour felt more compact even though it is a quoted 1cm larger in frame size.
The Hour felt stiffer and a bit more responsive...I felt more in control of it than on the Kilo. The Kilo felt softer when lots of force is put on it, as if it was flexing a bit compare to the rock solid feeling of the Hour.
That's about as precise as I can get with my observations. It was difficult to describe the differences observed on the bikes as I don't know a whole TON about bike geometry and such to really know where the differences come from.