[Bill Walker]

There are ranges, and then there are ranges. Without knowing the details that each quoted number is based on I can only guess. I assume the "range" number you quote is based on maximum fuel load. The "radius" number may be based on a reduced fuel load which makes it possible to lift the bomb without exceeding maximum gross weight.

Given the primary scouting role of both aircraft, it would make sense that the designer provided tanks large enough to maximize range without a bomb load. Carrying a bomb would only be possible then if the fuel load was decreased.