Dallas, in addition to what Randal has said, the more folding, the more flaws you may have in the manufacturing process and you guess the result.

Despite that I'm not quite "politica correct" in terms of WMA when it comes to katana quality vs European swords quality (just the tools, not the man), I still don't think the katana can cut through European swords in most occasions.
Anyway, try to read through this arma site first. There are plenty articles in the essay areas that would have solved your question. There are also many photos inside to show you how an european swords look like.
Perhaps we should read articles first, ask questions later?
