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I would say Mathieu has more. He's just as good of a tackler and possesses a better knack for creating turnovers imo. Also, Mathieu can contribute on special teams.
Thanks for the message Bob and I honestly don't see Ray Ray Armstrong getting drafted. Unless he's fortunate enough to get a combine invite and then have a unbelievable pro day, he may go late Round 6 at best in my opinion.