What where the differences between American and German Subs?

[OKO]

In any event, the German submarines did not produce victory. The American ones did.

japanese prosecution of US subs was FAR less effective than the one of the allies against german subs.

Just nothing to compare.

If you have had the same destroyer/sub ratio as in alantic, the US subs would have suffered the same kind of desaster as German subs during the late war.

Because the boats were nearly the same (considering global performances)
Even if german boat could dive deeper, the american ship could cruise speeder under see and were a lot more "confortable" (if you could say that about these kind of boats !)

I don't think anyone could say US submariners were better than germans one, especially at the beginning of the war, were german were better trained and US doctrine was inadequate (because of the lost of the surface fleet they were supposed to "escort" a bit in front of them).

Both nations had very valuable crews and boats.

But Axes just couldn't handled the US production capacity, in no matter.
Japanese underestimated the reaction of USA after pearl harbor, and that's why a frog like me can talk to you from a free country.