I have found info saying the Baby Buck and Spitfire have the same length barrel. I know the shape is different on the outside. What about the internal dimensions and internal shape of the barrel? Which do you prefer and why? Just wondering, because I see where alot of people have bought the Baby Buck and converted it to a Sorta Single

. Thinking about picking a Spitfire up at Sportsman's warehouse this weekend. Just had some questions. And thanks for the help.
God Bless and good luck this season.