Interesting comparison. I'm thinking about a Silverwing to replace my Reflex. I also have a bv series Piaggio, an '05 bv200. I'd buy a bv350 in a heartbeat but I can't get past the red seat (though I have not seen one in person to really make a true determination). In comparing the bv to the Silverwing mainly on ride quality, how "jarring" is the ride of the Silverwing? My bv rides like a luxury car compared to my Reflex which has a horrible choppy ride. You also stated that the riding position was somewhat similar between the Silverwing and the bv. The Silverwing has a seat height of 29.9 inches and the bv is somewhere around 30.5. Can you truly ride the Silverwing comfortably with your feet in the normal riding position like on the bv? On the reflex riding in that position locks my right hip up after a while. I have been riding it with my feet in the "cruiser" position and the hip is OK but I perfer riding in the upright position.
Any advice/help is appreciated!