I don't know about that. I'd say Madoff was a much bigger scammer.
Yes... I have to agree with you on this. Madoff conned billions of USD from his unsuspecting clients. Karpeles was not that bright. He could only stole around $300 million.
But the difference is that Madoff is currently sentenced to Life without Parole. On the other hand, Karpeles will never be prosecuted.