Although I have had both types, my subjective experience indicates that the DA shooting with a 2" is pretty much equivalent to SA as far as accuracy goes.
I had pared my collection down to Centennial models of various flavors but this Scandium 360 (Chief's Special) happened my way in an offer I could not refuse.
There is another reason I prefer the hammerless, but it is subjective also: When I examine my Centennial against the hammer model snub, the side plate is held on all sides on the hammerless where on the hammer model the sideplate is unsupported at the top side where the hammer comes thru.
So besides the non-snag, cleaner sealed action of the hammerless, I believe it is also a bit stronger with the fully enclosed top side of the frame. YMMV