My 6/8th Wonderedge is a more petite razor than my 6/8ths Puma Gold. The Wonderedge provides a bit more feedback than the Puma, but they both are equal in shave quality, in other words excellent. Both are hollow ground. They are as smooth as the Sheffield 6/8ths quarter hollow blade I shaved with today, and I generally find Sheffield blades to be very smooth when properly sharp.

The Puma is just a larger razor than the Duck. Scales are longer and perhaps a tad wider, spine is thicker as is the tang.

Perhaps your Duck is not quite there from a shaving sharpness standpoint. What I have found is that when a razor is almost there, but not quite, a few passes on a dry Coticule followed by 100 passes on canvas and 100 passes on horsehide will make the difference.