Here's another Baldwin quote:
Indeed, Admiral Doenitz's alleged exhortations to his sailors to "Kill! Kill! Kill!" are reminiscent of the ruthless "spurlos versenkt" policy of the first World war."
They are also reminiscent of Adm. Halsey's exhortations to his sailors to "Kill Japs! Kill Japs! Kill more Japs!"
Near as I can tell, Libertys and Victorys were almost identical, intended to carry 10,000 tons of cargo.
Victorys were a few feet longer, slightly deeper draft, but otherwise the main improvements were much more powerful engines and longer range.
The Victorys higher speed was intended to outrun U-boats, and near as I can tell, only two were sunk by U-boats in the Atlantic, two more by Kamikazes in the Pacific.
I can't find numbers for how many Libertys sank during the war -- or more to the point, during the same period as large numbers of Victorys operated -- but it must have been considerable.