I have a 27 and a 39 and love the 39. It is a great shooter. If it were me and those were my choices, I would take the 39 over the 27. But that is my personal preference and has nothing to do with which caliber I think is better, etc. It comes down to which one I shoot better. Hit a range that rents guns and shoot a couple diffferent guns. It may cost you some money to do it, but you will see which you prefer.
Learning from my mistakes since 1974