Found these - seems like breaking the lasso has less to do with strength and more to do with the fact that it is the Lasso of Truth, which is why Bizarro could break it - his perception of truth is not the same as Wonder Woman's.
In this instance 'Rama-Khan breaks it because Wonderwoman refuses to accept that he's telling the truth'.
I don't know anything about either of these issues,didn't read them, just found these on the web.