Chalk and cheese

Remember the first Baleo was laid down in June 42 and launched Oct same year
The first IXD2 was laid down in Nov 40 and launched March 42

The Baleo had an extra year and a half to be designed to suit the war as it was then

By 1943 Uboats were losing their deck guns as couldnt spend anytime on the surface where as the US boats had a much better time of it by then

You cant really compare the 2 vastly different theatres either

Try compare the ASW capabilities of the IJN and UK\US at the same time
lol
Plus as noted above the Ge factories were being bombed daily by then while the US ones remained untouched
Add to that the Germans were lacking in vital resources

Two totally different battles in the same war
Meh
No comparison really