The M&P45 has a longer sight radius then the M&P9. It can shoot in SSP and CDP in IDPA. It also shoots Major in USPSA and fits easily as a L10 and Production gun. It would be competing against 1911's in some of the classes, has a shorter barrel, lighter gun, worse trigger (fixable). It would have more recoil then the 9mm (unless reloading fixes this issue). Any thoughts on the M&P 45 as this dual purpose gun over the M&P9