No. You are asserting that they are not the same thing and they are. Jury nullification is the refusal to convict. Meaning that the jurors judged the law to be unconstitutional and immoral. In fact, jurors considered Al Capone more moral than the government and wouldn't indict or convict him.
So, IOW the OJ jury decided that a law against murder was "unconstitutional". I think you need to do a bit of self education before you opine on this subject.