Not even considering the condition of the SBE, that is an interesting question. Their is quite a price difference between the Franchi and Benelli and they both are inertia driven. What are the differences that justify the cost?
Me and my wife each have a Montefeltro. I did not look closely at the Franchi because I new the Benellis were good guns, but always wondered what I got for my extra money other than a lighter gun (which is really worth a lot).