The GP100's fit and finish is more or less comparable to that of the S&W 686 (sometimes not as good, but often right up there), but I think that aesthetically the design doesn't look as "refined" maybe, whatever that means. It's kind of hard to explain since I don't have much of an art background, but the GP100 looks sort of "crude" (even though it isn't) and blocky in comparison. Perhaps it's the apparent thickness of the GP100's top strap, and/or the lines and contours of the area where the barrel meets the frame. It's just an aesthetic issue, really. Both are good guns--well-made for mass-produced revolvers of their class. It's up to the individual to decide whether paying more for the 686's looks--and in the case of the Plus version, a 7-round capacity--is worthwhile, and whether its internal lock is a deal-breaker.