The Jug, hands down. High altitude performance, eight .050's with higher firing rates than any German cannon (less time-on-target), range, brutally tough and uncatchable in a dive.
In another role, these puppies in mass flights could have done more pin-point accuracy bombing of German targets than any carpet bombing of the day and saved countless lives on both sides. The pilots of Jugs at the reunions I attended made these comments with the look of disgust in their eyes for the SNAFUs at the top who under-utilized them. Lose 10 Jugs on a surgical strike that takes out the intended target and that's ten lives vs 20 in 2 B-17's. That and on their best days (clear, no winds) a B-17 group might manage target damage. Jugs would render a second mission unnecessary.
With the advent of the P-51 flying cover, Jugs could have done what all the heavies did in less time with less cost and loss of life.
Discuss.