What's with the eyes rolling, Flt Sgt?
He's right...the SAW is easily handled by one guy, whereas the M240 is (technically) a crew-served weapon. I've heard stories of guys who took their SAWs inside buildings and were able to use it with just as much effectiveness as an M4, only with 3x as much ammo ;D
The SAW is a smaller, less powerful weapon, really. Believe it or not it was adopted to give the US forces something more like an AK74 (man-portable, reliable full auto weapon)...not neccesarily replace the M60.