Hi, I'm looking into buying a new benelli within the next week or so. My question is whats the difference between the SBE2 and the M2. I know the SBE2 is 31/2 inch compared to the M2 being only 3 inch, as well as the SBE having a larger trigger guard. Other than that, how do the 2 compare to each other. The site says that SBE2 is faster on targets by 69% and the M2 is only faster by 20%. What differs in the guns? Thanks