Nonsense! You're imagining that there is a standard European submarine. No such thing. European SSKs currently in service are up to 80% of the displacement of the Collins class. SSKs now building are up to 75% of Collins size. According to you, a "Euro sub" is half that size. And that's ignoring SSNs, which one European SSK builder is currently building.... To put it into perspective this thing is equal to about 1/3 the displacement of a Euro sub and takes upto two to three times the space they dedicate to their batteries.
You're peddling irrational prejudice, not engaging in reasoned discussion.