Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
The B24 had IMHO a bigger impact on the war , it was the aircraft that closed the gap in the N Atlantic, Ploesti, also used extenbively in CBI by both RAF/USAAF .Renrch mentioned the liquid vs aircooled in choosing the 17 over the Lanc but many Lancs were powered by radials
The US 1000lb bomb simply couldn't get the job done. There's plenty of factual evidence that the AAF blew the roof of the factory (if they hit it) but didn't damage the machinery inside. The Germans could easily clean up the mess and start the production line back up. But the RAF used plenty of ordinance that was far more destructive (the 4000lb types were noted) that not only blew the roof off, but wrecked the machinery and caused far more lasting damage.
I agree, I think the restrictive bomb bays of the B-17 and B-24 were a major disadvantage.
I would go for the B17 over the Lancaster beause it had much heavier defensive armament and because it was more survivable because of the air cooled versus liquid cooled engines. Lancaster losses in daylight bombing would have been much heavier than the B17s.
Well nighttime missions you don't have to worry as much about AA fire than you would daytime. During the nighttime it wouldn't be as accurate as daytime.