Krusty,
I have never read anything that suggested the B-17's wing was stronger than the Lancaster's, let alone "a lot stronger".
Do you have a source?
SDGhalo,
Lancasters were maneuvered hard in evasives from German nightfighters and from searchlights. The "corkscrew" maneuver that was commonly used involved a dive, turning tightly, followed by a sharp climb, also turning tight.
The only four engined bomber in AH that might have comparable durability to the Lancaster would be the B-17. The B-29's wing spars are certainly stronger, but the B-29 masses so much more that the spar can't take as much of a load.