I never thought of the Parker SBT in terms of frame size, but as to the parts themselves, traceable DNA is everywhere. That makes sense in terms of manufacturing economy. The end result might not be the best of designs, but it is well executed, as Parkers are. The chamber length thing is a non-issue unless a person just likes to argue. I think they are delightful guns to shoot.
I am less enamored of the Smith. Smith had the sticky legacy of the rotary bolt that they were loathe to abandon. Designing a good single around that system proved awkward; the result is a gun that is less than smooth in operation. That said, I like the ergonomics of the Smith SBT.
The king of the heap was the Ithaca Knick, which had no old company baggage and was designed right the first time. It easily outsold the other SBTs despite only light advertising.
