Well here is what I have found. This is only for the 8th Airforce I am not sure of the validity of this but here we go:
B-17: 291,508 sorties, 640,306 bomb tonnage, 4688 losses, 6659 kills
B-24: 226,775 sorties, 452,508 bomb tonnage, 3626 losses, 2617 kills
The B-24 could carry more of a bomb load at a further distance and faster but was not as durable as the B-17.